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Finding the Fourth Proportional to 1,079.06, 1,489.07 and 637.00

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Solution

The fourth proportional to 1,079.06, 1,489.07 and 637.00 is: 879.04

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,079.06 : 1,489.07 = 637.00 : x
  2. Step 2: Convert to fraction form
    1,079.06/1,489.07 = 637.00/x
  3. Step 3: Cross multiply
    1,079.06x = 1,489.07 × 637.00
  4. Step 4: Simplify right side
    1,079.06x = 948,535.46
  5. Step 5: Solve for x
    x = 948,535.46/1,079.06
  6. Step 6: Final answer
    x = 879.04

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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.