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Finding the Fourth Proportional to 579,798.80, 869,698.20 and 439,830.80

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Solution

The fourth proportional to 579,798.80, 869,698.20 and 439,830.80 is: 659,746.20

Step by Step Solution

  1. Step 1: Write the proportion equation
    579,798.80 : 869,698.20 = 439,830.80 : x
  2. Step 2: Convert to fraction form
    579,798.80/869,698.20 = 439,830.80/x
  3. Step 3: Cross multiply
    579,798.80x = 869,698.20 × 439,830.80
  4. Step 4: Simplify right side
    579,798.80x = 382,520,055,064.56
  5. Step 5: Solve for x
    x = 382,520,055,064.56/579,798.80
  6. Step 6: Final answer
    x = 659,746.20

Related Problems

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Half scale
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Double scale
Find fourth proportional to 579,799.80, 869,699.70 and 439,831.80
Similar ratio
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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.