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Finding the Fourth Proportional to 675.48, 932.94 and 521.40

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Solution

The fourth proportional to 675.48, 932.94 and 521.40 is: 720.13

Step by Step Solution

  1. Step 1: Write the proportion equation
    675.48 : 932.94 = 521.40 : x
  2. Step 2: Convert to fraction form
    675.48/932.94 = 521.40/x
  3. Step 3: Cross multiply
    675.48x = 932.94 × 521.40
  4. Step 4: Simplify right side
    675.48x = 486,434.92
  5. Step 5: Solve for x
    x = 486,434.92/675.48
  6. Step 6: Final answer
    x = 720.13

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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.