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Finding the Fourth Proportional to 737.76, 1,017.60 and 672

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Solution

The fourth proportional to 737.76, 1,017.60 and 672 is: 926.90

Step by Step Solution

  1. Step 1: Write the proportion equation
    737.76 : 1,017.60 = 672 : x
  2. Step 2: Convert to fraction form
    737.76/1,017.60 = 672/x
  3. Step 3: Cross multiply
    737.76x = 1,017.60 × 672
  4. Step 4: Simplify right side
    737.76x = 683,827.20
  5. Step 5: Solve for x
    x = 683,827.20/737.76
  6. Step 6: Final answer
    x = 926.90

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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.