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Finding the Fourth Proportional to 521.33, 781.76 and 156.04

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Solution

The fourth proportional to 521.33, 781.76 and 156.04 is: 234.00

Step by Step Solution

  1. Step 1: Write the proportion equation
    521.33 : 781.76 = 156.04 : x
  2. Step 2: Convert to fraction form
    521.33/781.76 = 156.04/x
  3. Step 3: Cross multiply
    521.33x = 781.76 × 156.04
  4. Step 4: Simplify right side
    521.33x = 121,988.22
  5. Step 5: Solve for x
    x = 121,988.22/521.33
  6. Step 6: Final answer
    x = 234.00

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Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.