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Finding the Fourth Proportional to 469.28, 702.76 and 306.80

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Solution

The fourth proportional to 469.28, 702.76 and 306.80 is: 459.44

Step by Step Solution

  1. Step 1: Write the proportion equation
    469.28 : 702.76 = 306.80 : x
  2. Step 2: Convert to fraction form
    469.28/702.76 = 306.80/x
  3. Step 3: Cross multiply
    469.28x = 702.76 × 306.80
  4. Step 4: Simplify right side
    469.28x = 215,606.77
  5. Step 5: Solve for x
    x = 215,606.77/469.28
  6. Step 6: Final answer
    x = 459.44

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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.