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Finding the Fourth Proportional to 1,418.87, 1,957.90 and 887.65

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Solution

The fourth proportional to 1,418.87, 1,957.90 and 887.65 is: 1,224.87

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,418.87 : 1,957.90 = 887.65 : x
  2. Step 2: Convert to fraction form
    1,418.87/1,957.90 = 887.65/x
  3. Step 3: Cross multiply
    1,418.87x = 1,957.90 × 887.65
  4. Step 4: Simplify right side
    1,418.87x = 1,737,929.94
  5. Step 5: Solve for x
    x = 1,737,929.94/1,418.87
  6. Step 6: Final answer
    x = 1,224.87

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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.