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Finding the Fourth Proportional to 472.17, 707.45 and 380.91

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Solution

The fourth proportional to 472.17, 707.45 and 380.91 is: 570.71

Step by Step Solution

  1. Step 1: Write the proportion equation
    472.17 : 707.45 = 380.91 : x
  2. Step 2: Convert to fraction form
    472.17/707.45 = 380.91/x
  3. Step 3: Cross multiply
    472.17x = 707.45 × 380.91
  4. Step 4: Simplify right side
    472.17x = 269,472.87
  5. Step 5: Solve for x
    x = 269,472.87/472.17
  6. Step 6: Final answer
    x = 570.71

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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.