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Finding the Fourth Proportional to 579,700.60, 869,550.90 and 486,388.60

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Solution

The fourth proportional to 579,700.60, 869,550.90 and 486,388.60 is: 729,582.90

Step by Step Solution

  1. Step 1: Write the proportion equation
    579,700.60 : 869,550.90 = 486,388.60 : x
  2. Step 2: Convert to fraction form
    579,700.60/869,550.90 = 486,388.60/x
  3. Step 3: Cross multiply
    579,700.60x = 869,550.90 × 486,388.60
  4. Step 4: Simplify right side
    579,700.60x = 422,939,644,879.74
  5. Step 5: Solve for x
    x = 422,939,644,879.74/579,700.60
  6. Step 6: Final answer
    x = 729,582.90

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Double scale
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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.