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Finding the Fourth Proportional to 1,359.73, 1,874.24 and 916.87

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Solution

The fourth proportional to 1,359.73, 1,874.24 and 916.87 is: 1,263.80

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,359.73 : 1,874.24 = 916.87 : x
  2. Step 2: Convert to fraction form
    1,359.73/1,874.24 = 916.87/x
  3. Step 3: Cross multiply
    1,359.73x = 1,874.24 × 916.87
  4. Step 4: Simplify right side
    1,359.73x = 1,718,420.47
  5. Step 5: Solve for x
    x = 1,718,420.47/1,359.73
  6. Step 6: Final answer
    x = 1,263.80

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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.