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Finding the Fourth Proportional to 451.17, 672.84 and 392.85

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Solution

The fourth proportional to 451.17, 672.84 and 392.85 is: 585.87

Step by Step Solution

  1. Step 1: Write the proportion equation
    451.17 : 672.84 = 392.85 : x
  2. Step 2: Convert to fraction form
    451.17/672.84 = 392.85/x
  3. Step 3: Cross multiply
    451.17x = 672.84 × 392.85
  4. Step 4: Simplify right side
    451.17x = 264,325.19
  5. Step 5: Solve for x
    x = 264,325.19/451.17
  6. Step 6: Final answer
    x = 585.87

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Why These Related Problems?

These problems maintain the same ratio (1.49) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.