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Finding the Fourth Proportional to 1,753.24, 2,630.76 and 780.04

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Solution

The fourth proportional to 1,753.24, 2,630.76 and 780.04 is: 1,170.46

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,753.24 : 2,630.76 = 780.04 : x
  2. Step 2: Convert to fraction form
    1,753.24/2,630.76 = 780.04/x
  3. Step 3: Cross multiply
    1,753.24x = 2,630.76 × 780.04
  4. Step 4: Simplify right side
    1,753.24x = 2,052,098.03
  5. Step 5: Solve for x
    x = 2,052,098.03/1,753.24
  6. Step 6: Final answer
    x = 1,170.46

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Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.