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Finding the Fourth Proportional to 937.71, 1,405.88 and 451.11

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Solution

The fourth proportional to 937.71, 1,405.88 and 451.11 is: 676.34

Step by Step Solution

  1. Step 1: Write the proportion equation
    937.71 : 1,405.88 = 451.11 : x
  2. Step 2: Convert to fraction form
    937.71/1,405.88 = 451.11/x
  3. Step 3: Cross multiply
    937.71x = 1,405.88 × 451.11
  4. Step 4: Simplify right side
    937.71x = 634,206.53
  5. Step 5: Solve for x
    x = 634,206.53/937.71
  6. Step 6: Final answer
    x = 676.34

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Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.