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Finding the Fourth Proportional to 672.11, 926.53 and 472.31

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Solution

The fourth proportional to 672.11, 926.53 and 472.31 is: 651.09

Step by Step Solution

  1. Step 1: Write the proportion equation
    672.11 : 926.53 = 472.31 : x
  2. Step 2: Convert to fraction form
    672.11/926.53 = 472.31/x
  3. Step 3: Cross multiply
    672.11x = 926.53 × 472.31
  4. Step 4: Simplify right side
    672.11x = 437,603.57
  5. Step 5: Solve for x
    x = 437,603.57/672.11
  6. Step 6: Final answer
    x = 651.09

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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.