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Finding the Fourth Proportional to 1,031.06, 1,422.87 and 565.31

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Solution

The fourth proportional to 1,031.06, 1,422.87 and 565.31 is: 780.13

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,031.06 : 1,422.87 = 565.31 : x
  2. Step 2: Convert to fraction form
    1,031.06/1,422.87 = 565.31/x
  3. Step 3: Cross multiply
    1,031.06x = 1,422.87 × 565.31
  4. Step 4: Simplify right side
    1,031.06x = 804,364.08
  5. Step 5: Solve for x
    x = 804,364.08/1,031.06
  6. Step 6: Final answer
    x = 780.13

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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.