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Finding the Fourth Proportional to 521,572.20, 782,358.30 and 403,328.40

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Solution

The fourth proportional to 521,572.20, 782,358.30 and 403,328.40 is: 604,992.60

Step by Step Solution

  1. Step 1: Write the proportion equation
    521,572.20 : 782,358.30 = 403,328.40 : x
  2. Step 2: Convert to fraction form
    521,572.20/782,358.30 = 403,328.40/x
  3. Step 3: Cross multiply
    521,572.20x = 782,358.30 × 403,328.40
  4. Step 4: Simplify right side
    521,572.20x = 315,547,321,365.72
  5. Step 5: Solve for x
    x = 315,547,321,365.72/521,572.20
  6. Step 6: Final answer
    x = 604,992.60

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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.