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Finding the Fourth Proportional to 1,230.87, 1,844.67 and 917.13

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Solution

The fourth proportional to 1,230.87, 1,844.67 and 917.13 is: 1,374.48

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,230.87 : 1,844.67 = 917.13 : x
  2. Step 2: Convert to fraction form
    1,230.87/1,844.67 = 917.13/x
  3. Step 3: Cross multiply
    1,230.87x = 1,844.67 × 917.13
  4. Step 4: Simplify right side
    1,230.87x = 1,691,802.20
  5. Step 5: Solve for x
    x = 1,691,802.20/1,230.87
  6. Step 6: Final answer
    x = 1,374.48

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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.