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Finding the Fourth Proportional to 762.66, 1,052.43 and 431.07

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Solution

The fourth proportional to 762.66, 1,052.43 and 431.07 is: 594.85

Step by Step Solution

  1. Step 1: Write the proportion equation
    762.66 : 1,052.43 = 431.07 : x
  2. Step 2: Convert to fraction form
    762.66/1,052.43 = 431.07/x
  3. Step 3: Cross multiply
    762.66x = 1,052.43 × 431.07
  4. Step 4: Simplify right side
    762.66x = 453,672.08
  5. Step 5: Solve for x
    x = 453,672.08/762.66
  6. Step 6: Final answer
    x = 594.85

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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.