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Finding the Fourth Proportional to 1,718.87, 2,372.24 and 1,438.61

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Solution

The fourth proportional to 1,718.87, 2,372.24 and 1,438.61 is: 1,985.44

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,718.87 : 2,372.24 = 1,438.61 : x
  2. Step 2: Convert to fraction form
    1,718.87/2,372.24 = 1,438.61/x
  3. Step 3: Cross multiply
    1,718.87x = 2,372.24 × 1,438.61
  4. Step 4: Simplify right side
    1,718.87x = 3,412,709.13
  5. Step 5: Solve for x
    x = 3,412,709.13/1,718.87
  6. Step 6: Final answer
    x = 1,985.44

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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.