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Finding the Fourth Proportional to 1,079.10, 1,489.32 and 637.04

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Solution

The fourth proportional to 1,079.10, 1,489.32 and 637.04 is: 879.21

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,079.10 : 1,489.32 = 637.04 : x
  2. Step 2: Convert to fraction form
    1,079.10/1,489.32 = 637.04/x
  3. Step 3: Cross multiply
    1,079.10x = 1,489.32 × 637.04
  4. Step 4: Simplify right side
    1,079.10x = 948,756.41
  5. Step 5: Solve for x
    x = 948,756.41/1,079.10
  6. Step 6: Final answer
    x = 879.21

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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.