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Finding the Fourth Proportional to 1,102.37, 1,520.84 and 709.52

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Solution

The fourth proportional to 1,102.37, 1,520.84 and 709.52 is: 978.86

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,102.37 : 1,520.84 = 709.52 : x
  2. Step 2: Convert to fraction form
    1,102.37/1,520.84 = 709.52/x
  3. Step 3: Cross multiply
    1,102.37x = 1,520.84 × 709.52
  4. Step 4: Simplify right side
    1,102.37x = 1,079,060.57
  5. Step 5: Solve for x
    x = 1,079,060.57/1,102.37
  6. Step 6: Final answer
    x = 978.86

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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.