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Finding the Fourth Proportional to 1,230.11, 1,697.90 and 751.74

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Solution

The fourth proportional to 1,230.11, 1,697.90 and 751.74 is: 1,037.62

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,230.11 : 1,697.90 = 751.74 : x
  2. Step 2: Convert to fraction form
    1,230.11/1,697.90 = 751.74/x
  3. Step 3: Cross multiply
    1,230.11x = 1,697.90 × 751.74
  4. Step 4: Simplify right side
    1,230.11x = 1,276,375.59
  5. Step 5: Solve for x
    x = 1,276,375.59/1,230.11
  6. Step 6: Final answer
    x = 1,037.62

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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.