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Finding the Fourth Proportional to 579,918.80, 869,878.20 and 423,246.80

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Solution

The fourth proportional to 579,918.80, 869,878.20 and 423,246.80 is: 634,870.20

Step by Step Solution

  1. Step 1: Write the proportion equation
    579,918.80 : 869,878.20 = 423,246.80 : x
  2. Step 2: Convert to fraction form
    579,918.80/869,878.20 = 423,246.80/x
  3. Step 3: Cross multiply
    579,918.80x = 869,878.20 × 423,246.80
  4. Step 4: Simplify right side
    579,918.80x = 368,173,164,539.76
  5. Step 5: Solve for x
    x = 368,173,164,539.76/579,918.80
  6. Step 6: Final answer
    x = 634,870.20

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Half scale
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Double scale
Find fourth proportional to 579,919.80, 869,879.70 and 423,247.80
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.