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Finding the Fourth Proportional to 672.39, 927.77 and 392.54

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Solution

The fourth proportional to 672.39, 927.77 and 392.54 is: 541.62

Step by Step Solution

  1. Step 1: Write the proportion equation
    672.39 : 927.77 = 392.54 : x
  2. Step 2: Convert to fraction form
    672.39/927.77 = 392.54/x
  3. Step 3: Cross multiply
    672.39x = 927.77 × 392.54
  4. Step 4: Simplify right side
    672.39x = 364,180.23
  5. Step 5: Solve for x
    x = 364,180.23/672.39
  6. Step 6: Final answer
    x = 541.62

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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.