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Finding the Fourth Proportional to 753.87, 1,127.98 and 445.87

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Solution

The fourth proportional to 753.87, 1,127.98 and 445.87 is: 667.13

Step by Step Solution

  1. Step 1: Write the proportion equation
    753.87 : 1,127.98 = 445.87 : x
  2. Step 2: Convert to fraction form
    753.87/1,127.98 = 445.87/x
  3. Step 3: Cross multiply
    753.87x = 1,127.98 × 445.87
  4. Step 4: Simplify right side
    753.87x = 502,931.90
  5. Step 5: Solve for x
    x = 502,931.90/753.87
  6. Step 6: Final answer
    x = 667.13

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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.