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Finding the Fourth Proportional to 542.72, 814.89 and 519.68

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Solution

The fourth proportional to 542.72, 814.89 and 519.68 is: 780.30

Step by Step Solution

  1. Step 1: Write the proportion equation
    542.72 : 814.89 = 519.68 : x
  2. Step 2: Convert to fraction form
    542.72/814.89 = 519.68/x
  3. Step 3: Cross multiply
    542.72x = 814.89 × 519.68
  4. Step 4: Simplify right side
    542.72x = 423,482.04
  5. Step 5: Solve for x
    x = 423,482.04/542.72
  6. Step 6: Final answer
    x = 780.30

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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.