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Finding the Fourth Proportional to 672.46, 927.74 and 439.18

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Solution

The fourth proportional to 672.46, 927.74 and 439.18 is: 605.90

Step by Step Solution

  1. Step 1: Write the proportion equation
    672.46 : 927.74 = 439.18 : x
  2. Step 2: Convert to fraction form
    672.46/927.74 = 439.18/x
  3. Step 3: Cross multiply
    672.46x = 927.74 × 439.18
  4. Step 4: Simplify right side
    672.46x = 407,443.63
  5. Step 5: Solve for x
    x = 407,443.63/672.46
  6. Step 6: Final answer
    x = 605.90

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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.