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Finding the Fourth Proportional to 636,512.31, 878,360.25 and 360,888.72

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Solution

The fourth proportional to 636,512.31, 878,360.25 and 360,888.72 is: 498,011.27

Step by Step Solution

  1. Step 1: Write the proportion equation
    636,512.31 : 878,360.25 = 360,888.72 : x
  2. Step 2: Convert to fraction form
    636,512.31/878,360.25 = 360,888.72/x
  3. Step 3: Cross multiply
    636,512.31x = 878,360.25 × 360,888.72
  4. Step 4: Simplify right side
    636,512.31x = 316,990,304,380.86
  5. Step 5: Solve for x
    x = 316,990,304,380.86/636,512.31
  6. Step 6: Final answer
    x = 498,011.27

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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.