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Finding the Fourth Proportional to 663,376.50, 915,449.44 and 372,988.34

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Solution

The fourth proportional to 663,376.50, 915,449.44 and 372,988.34 is: 514,718.21

Step by Step Solution

  1. Step 1: Write the proportion equation
    663,376.50 : 915,449.44 = 372,988.34 : x
  2. Step 2: Convert to fraction form
    663,376.50/915,449.44 = 372,988.34/x
  3. Step 3: Cross multiply
    663,376.50x = 915,449.44 × 372,988.34
  4. Step 4: Simplify right side
    663,376.50x = 341,451,966,979.53
  5. Step 5: Solve for x
    x = 341,451,966,979.53/663,376.50
  6. Step 6: Final answer
    x = 514,718.21

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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.