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Finding the Fourth Proportional to 1,079.61, 1,489.10 and 1,063.41

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Solution

The fourth proportional to 1,079.61, 1,489.10 and 1,063.41 is: 1,466.75

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,079.61 : 1,489.10 = 1,063.41 : x
  2. Step 2: Convert to fraction form
    1,079.61/1,489.10 = 1,063.41/x
  3. Step 3: Cross multiply
    1,079.61x = 1,489.10 × 1,063.41
  4. Step 4: Simplify right side
    1,079.61x = 1,583,518.51
  5. Step 5: Solve for x
    x = 1,583,518.51/1,079.61
  6. Step 6: Final answer
    x = 1,466.75

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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.