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Finding the Fourth Proportional to 1,044.59, 1,565.34 and 986.15

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Solution

The fourth proportional to 1,044.59, 1,565.34 and 986.15 is: 1,477.77

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,044.59 : 1,565.34 = 986.15 : x
  2. Step 2: Convert to fraction form
    1,044.59/1,565.34 = 986.15/x
  3. Step 3: Cross multiply
    1,044.59x = 1,565.34 × 986.15
  4. Step 4: Simplify right side
    1,044.59x = 1,543,660.04
  5. Step 5: Solve for x
    x = 1,543,660.04/1,044.59
  6. Step 6: Final answer
    x = 1,477.77

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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.