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Finding the Fourth Proportional to 1,344.80, 2,016.59 and 553.61

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Solution

The fourth proportional to 1,344.80, 2,016.59 and 553.61 is: 830.16

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,344.80 : 2,016.59 = 553.61 : x
  2. Step 2: Convert to fraction form
    1,344.80/2,016.59 = 553.61/x
  3. Step 3: Cross multiply
    1,344.80x = 2,016.59 × 553.61
  4. Step 4: Simplify right side
    1,344.80x = 1,116,404.39
  5. Step 5: Solve for x
    x = 1,116,404.39/1,344.80
  6. Step 6: Final answer
    x = 830.16

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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.