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Finding the Fourth Proportional to 672.21, 927.59 and 392.36

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Solution

The fourth proportional to 672.21, 927.59 and 392.36 is: 541.41

Step by Step Solution

  1. Step 1: Write the proportion equation
    672.21 : 927.59 = 392.36 : x
  2. Step 2: Convert to fraction form
    672.21/927.59 = 392.36/x
  3. Step 3: Cross multiply
    672.21x = 927.59 × 392.36
  4. Step 4: Simplify right side
    672.21x = 363,942.61
  5. Step 5: Solve for x
    x = 363,942.61/672.21
  6. Step 6: Final answer
    x = 541.41

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1.5x scale

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.