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Finding the Fourth Proportional to 627,732.32, 865,990.86 and 418,237.16

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Solution

The fourth proportional to 627,732.32, 865,990.86 and 418,237.16 is: 576,980.90

Step by Step Solution

  1. Step 1: Write the proportion equation
    627,732.32 : 865,990.86 = 418,237.16 : x
  2. Step 2: Convert to fraction form
    627,732.32/865,990.86 = 418,237.16/x
  3. Step 3: Cross multiply
    627,732.32x = 865,990.86 × 418,237.16
  4. Step 4: Simplify right side
    627,732.32x = 362,189,557,872.36
  5. Step 5: Solve for x
    x = 362,189,557,872.36/627,732.32
  6. Step 6: Final answer
    x = 576,980.90

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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.