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Finding the Fourth Proportional to 1,957.46, 2,934.18 and 861.62

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Solution

The fourth proportional to 1,957.46, 2,934.18 and 861.62 is: 1,291.55

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,957.46 : 2,934.18 = 861.62 : x
  2. Step 2: Convert to fraction form
    1,957.46/2,934.18 = 861.62/x
  3. Step 3: Cross multiply
    1,957.46x = 2,934.18 × 861.62
  4. Step 4: Simplify right side
    1,957.46x = 2,528,148.17
  5. Step 5: Solve for x
    x = 2,528,148.17/1,957.46
  6. Step 6: Final answer
    x = 1,291.55

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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.