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Finding the Fourth Proportional to 1,439.76, 1,988.04 and 1,026

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Solution

The fourth proportional to 1,439.76, 1,988.04 and 1,026 is: 1,416.71

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,439.76 : 1,988.04 = 1,026 : x
  2. Step 2: Convert to fraction form
    1,439.76/1,988.04 = 1,026/x
  3. Step 3: Cross multiply
    1,439.76x = 1,988.04 × 1,026
  4. Step 4: Simplify right side
    1,439.76x = 2,039,729.04
  5. Step 5: Solve for x
    x = 2,039,729.04/1,439.76
  6. Step 6: Final answer
    x = 1,416.71

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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.