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Finding the Fourth Proportional to 1,031.25, 1,423.13 and 565.50

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Solution

The fourth proportional to 1,031.25, 1,423.13 and 565.50 is: 780.39

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,031.25 : 1,423.13 = 565.50 : x
  2. Step 2: Convert to fraction form
    1,031.25/1,423.13 = 565.50/x
  3. Step 3: Cross multiply
    1,031.25x = 1,423.13 × 565.50
  4. Step 4: Simplify right side
    1,031.25x = 804,777.19
  5. Step 5: Solve for x
    x = 804,777.19/1,031.25
  6. Step 6: Final answer
    x = 780.39

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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.