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Finding the Fourth Proportional to 476.76, 715.15 and 269.85

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Solution

The fourth proportional to 476.76, 715.15 and 269.85 is: 404.78

Step by Step Solution

  1. Step 1: Write the proportion equation
    476.76 : 715.15 = 269.85 : x
  2. Step 2: Convert to fraction form
    476.76/715.15 = 269.85/x
  3. Step 3: Cross multiply
    476.76x = 715.15 × 269.85
  4. Step 4: Simplify right side
    476.76x = 192,980.77
  5. Step 5: Solve for x
    x = 192,980.77/476.76
  6. Step 6: Final answer
    x = 404.78

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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.