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Finding the Fourth Proportional to 762.66, 1,052.51 and 431.11

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Solution

The fourth proportional to 762.66, 1,052.51 and 431.11 is: 594.96

Step by Step Solution

  1. Step 1: Write the proportion equation
    762.66 : 1,052.51 = 431.11 : x
  2. Step 2: Convert to fraction form
    762.66/1,052.51 = 431.11/x
  3. Step 3: Cross multiply
    762.66x = 1,052.51 × 431.11
  4. Step 4: Simplify right side
    762.66x = 453,752.61
  5. Step 5: Solve for x
    x = 453,752.61/762.66
  6. Step 6: Final answer
    x = 594.96

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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.