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Finding the Fourth Proportional to 762.60, 1,052.34 and 431

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Solution

The fourth proportional to 762.60, 1,052.34 and 431 is: 594.75

Step by Step Solution

  1. Step 1: Write the proportion equation
    762.60 : 1,052.34 = 431 : x
  2. Step 2: Convert to fraction form
    762.60/1,052.34 = 431/x
  3. Step 3: Cross multiply
    762.60x = 1,052.34 × 431
  4. Step 4: Simplify right side
    762.60x = 453,558.54
  5. Step 5: Solve for x
    x = 453,558.54/762.60
  6. Step 6: Final answer
    x = 594.75

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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.