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Finding the Fourth Proportional to 672.55, 928.09 and 377.81

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Solution

The fourth proportional to 672.55, 928.09 and 377.81 is: 521.36

Step by Step Solution

  1. Step 1: Write the proportion equation
    672.55 : 928.09 = 377.81 : x
  2. Step 2: Convert to fraction form
    672.55/928.09 = 377.81/x
  3. Step 3: Cross multiply
    672.55x = 928.09 × 377.81
  4. Step 4: Simplify right side
    672.55x = 350,641.00
  5. Step 5: Solve for x
    x = 350,641.00/672.55
  6. Step 6: Final answer
    x = 521.36

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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.