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Finding the Fourth Proportional to 472.78, 652.23 and 313.24

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Solution

The fourth proportional to 472.78, 652.23 and 313.24 is: 432.13

Step by Step Solution

  1. Step 1: Write the proportion equation
    472.78 : 652.23 = 313.24 : x
  2. Step 2: Convert to fraction form
    472.78/652.23 = 313.24/x
  3. Step 3: Cross multiply
    472.78x = 652.23 × 313.24
  4. Step 4: Simplify right side
    472.78x = 204,304.53
  5. Step 5: Solve for x
    x = 204,304.53/472.78
  6. Step 6: Final answer
    x = 432.13

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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.