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Finding the Fourth Proportional to 606,728.40, 911,404.80 and 429,581.40

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Solution

The fourth proportional to 606,728.40, 911,404.80 and 429,581.40 is: 645,301.18

Step by Step Solution

  1. Step 1: Write the proportion equation
    606,728.40 : 911,404.80 = 429,581.40 : x
  2. Step 2: Convert to fraction form
    606,728.40/911,404.80 = 429,581.40/x
  3. Step 3: Cross multiply
    606,728.40x = 911,404.80 × 429,581.40
  4. Step 4: Simplify right side
    606,728.40x = 391,522,549,950.72
  5. Step 5: Solve for x
    x = 391,522,549,950.72/606,728.40
  6. Step 6: Final answer
    x = 645,301.18

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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.