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Finding the Fourth Proportional to 1,159.12, 1,737.46 and 916.93

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Solution

The fourth proportional to 1,159.12, 1,737.46 and 916.93 is: 1,374.43

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,159.12 : 1,737.46 = 916.93 : x
  2. Step 2: Convert to fraction form
    1,159.12/1,737.46 = 916.93/x
  3. Step 3: Cross multiply
    1,159.12x = 1,737.46 × 916.93
  4. Step 4: Simplify right side
    1,159.12x = 1,593,129.20
  5. Step 5: Solve for x
    x = 1,593,129.20/1,159.12
  6. Step 6: Final answer
    x = 1,374.43

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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.