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Finding the Fourth Proportional to 476.76, 658.48 and 319.16

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Solution

The fourth proportional to 476.76, 658.48 and 319.16 is: 440.81

Step by Step Solution

  1. Step 1: Write the proportion equation
    476.76 : 658.48 = 319.16 : x
  2. Step 2: Convert to fraction form
    476.76/658.48 = 319.16/x
  3. Step 3: Cross multiply
    476.76x = 658.48 × 319.16
  4. Step 4: Simplify right side
    476.76x = 210,160.48
  5. Step 5: Solve for x
    x = 210,160.48/476.76
  6. Step 6: Final answer
    x = 440.81

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Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.