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Finding the Fourth Proportional to 502.22, 752.95 and 319.58

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Solution

The fourth proportional to 502.22, 752.95 and 319.58 is: 479.13

Step by Step Solution

  1. Step 1: Write the proportion equation
    502.22 : 752.95 = 319.58 : x
  2. Step 2: Convert to fraction form
    502.22/752.95 = 319.58/x
  3. Step 3: Cross multiply
    502.22x = 752.95 × 319.58
  4. Step 4: Simplify right side
    502.22x = 240,627.76
  5. Step 5: Solve for x
    x = 240,627.76/502.22
  6. Step 6: Final answer
    x = 479.13

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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.