Home / 1,108.15-1,529.20-635.72

Finding the Fourth Proportional to 1,108.15, 1,529.20 and 635.72

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Solution

The fourth proportional to 1,108.15, 1,529.20 and 635.72 is: 877.27

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,108.15 : 1,529.20 = 635.72 : x
  2. Step 2: Convert to fraction form
    1,108.15/1,529.20 = 635.72/x
  3. Step 3: Cross multiply
    1,108.15x = 1,529.20 × 635.72
  4. Step 4: Simplify right side
    1,108.15x = 972,143.02
  5. Step 5: Solve for x
    x = 972,143.02/1,108.15
  6. Step 6: Final answer
    x = 877.27

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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.