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Finding the Fourth Proportional to 810.11, 1,118.15 and 529.88

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Solution

The fourth proportional to 810.11, 1,118.15 and 529.88 is: 731.37

Step by Step Solution

  1. Step 1: Write the proportion equation
    810.11 : 1,118.15 = 529.88 : x
  2. Step 2: Convert to fraction form
    810.11/1,118.15 = 529.88/x
  3. Step 3: Cross multiply
    810.11x = 1,118.15 × 529.88
  4. Step 4: Simplify right side
    810.11x = 592,488.34
  5. Step 5: Solve for x
    x = 592,488.34/810.11
  6. Step 6: Final answer
    x = 731.37

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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.