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Finding the Fourth Proportional to 521,430.60, 782,145.90 and 403,332.60

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Solution

The fourth proportional to 521,430.60, 782,145.90 and 403,332.60 is: 604,998.90

Step by Step Solution

  1. Step 1: Write the proportion equation
    521,430.60 : 782,145.90 = 403,332.60 : x
  2. Step 2: Convert to fraction form
    521,430.60/782,145.90 = 403,332.60/x
  3. Step 3: Cross multiply
    521,430.60x = 782,145.90 × 403,332.60
  4. Step 4: Simplify right side
    521,430.60x = 315,464,939,426.34
  5. Step 5: Solve for x
    x = 315,464,939,426.34/521,430.60
  6. Step 6: Final answer
    x = 604,998.90

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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.