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Finding the Fourth Proportional to 1,409.13, 2,113.53 and 484.55

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Solution

The fourth proportional to 1,409.13, 2,113.53 and 484.55 is: 726.76

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,409.13 : 2,113.53 = 484.55 : x
  2. Step 2: Convert to fraction form
    1,409.13/2,113.53 = 484.55/x
  3. Step 3: Cross multiply
    1,409.13x = 2,113.53 × 484.55
  4. Step 4: Simplify right side
    1,409.13x = 1,024,100.39
  5. Step 5: Solve for x
    x = 1,024,100.39/1,409.13
  6. Step 6: Final answer
    x = 726.76

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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.