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Finding the Fourth Proportional to 501.68, 752.78 and 319.16

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Solution

The fourth proportional to 501.68, 752.78 and 319.16 is: 478.90

Step by Step Solution

  1. Step 1: Write the proportion equation
    501.68 : 752.78 = 319.16 : x
  2. Step 2: Convert to fraction form
    501.68/752.78 = 319.16/x
  3. Step 3: Cross multiply
    501.68x = 752.78 × 319.16
  4. Step 4: Simplify right side
    501.68x = 240,254.30
  5. Step 5: Solve for x
    x = 240,254.30/501.68
  6. Step 6: Final answer
    x = 478.90

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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.