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Finding the Fourth Proportional to 937.62, 1,407.11 and 766.31

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Solution

The fourth proportional to 937.62, 1,407.11 and 766.31 is: 1,150.01

Step by Step Solution

  1. Step 1: Write the proportion equation
    937.62 : 1,407.11 = 766.31 : x
  2. Step 2: Convert to fraction form
    937.62/1,407.11 = 766.31/x
  3. Step 3: Cross multiply
    937.62x = 1,407.11 × 766.31
  4. Step 4: Simplify right side
    937.62x = 1,078,271.60
  5. Step 5: Solve for x
    x = 1,078,271.60/937.62
  6. Step 6: Final answer
    x = 1,150.01

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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.