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Finding the Fourth Proportional to 502.05, 751.56 and 319.20

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Solution

The fourth proportional to 502.05, 751.56 and 319.20 is: 477.84

Step by Step Solution

  1. Step 1: Write the proportion equation
    502.05 : 751.56 = 319.20 : x
  2. Step 2: Convert to fraction form
    502.05/751.56 = 319.20/x
  3. Step 3: Cross multiply
    502.05x = 751.56 × 319.20
  4. Step 4: Simplify right side
    502.05x = 239,897.95
  5. Step 5: Solve for x
    x = 239,897.95/502.05
  6. Step 6: Final answer
    x = 477.84

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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.