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Finding the Fourth Proportional to 521.04, 781.05 and 338.52

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Solution

The fourth proportional to 521.04, 781.05 and 338.52 is: 507.45

Step by Step Solution

  1. Step 1: Write the proportion equation
    521.04 : 781.05 = 338.52 : x
  2. Step 2: Convert to fraction form
    521.04/781.05 = 338.52/x
  3. Step 3: Cross multiply
    521.04x = 781.05 × 338.52
  4. Step 4: Simplify right side
    521.04x = 264,401.05
  5. Step 5: Solve for x
    x = 264,401.05/521.04
  6. Step 6: Final answer
    x = 507.45

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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.