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Finding the Fourth Proportional to 724,286.90, 999,639.66 and 418,308.32

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Solution

The fourth proportional to 724,286.90, 999,639.66 and 418,308.32 is: 577,336.95

Step by Step Solution

  1. Step 1: Write the proportion equation
    724,286.90 : 999,639.66 = 418,308.32 : x
  2. Step 2: Convert to fraction form
    724,286.90/999,639.66 = 418,308.32/x
  3. Step 3: Cross multiply
    724,286.90x = 999,639.66 × 418,308.32
  4. Step 4: Simplify right side
    724,286.90x = 418,157,586,779.97
  5. Step 5: Solve for x
    x = 418,157,586,779.97/724,286.90
  6. Step 6: Final answer
    x = 577,336.95

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.