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Finding the Fourth Proportional to 606,724.40, 911,398.80 and 429,577.40

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Solution

The fourth proportional to 606,724.40, 911,398.80 and 429,577.40 is: 645,295.17

Step by Step Solution

  1. Step 1: Write the proportion equation
    606,724.40 : 911,398.80 = 429,577.40 : x
  2. Step 2: Convert to fraction form
    606,724.40/911,398.80 = 429,577.40/x
  3. Step 3: Cross multiply
    606,724.40x = 911,398.80 × 429,577.40
  4. Step 4: Simplify right side
    606,724.40x = 391,516,326,867.12
  5. Step 5: Solve for x
    x = 391,516,326,867.12/606,724.40
  6. Step 6: Final answer
    x = 645,295.17

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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.