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Finding the Fourth Proportional to 1,419.49, 2,129.28 and 482.59

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Solution

The fourth proportional to 1,419.49, 2,129.28 and 482.59 is: 723.90

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,419.49 : 2,129.28 = 482.59 : x
  2. Step 2: Convert to fraction form
    1,419.49/2,129.28 = 482.59/x
  3. Step 3: Cross multiply
    1,419.49x = 2,129.28 × 482.59
  4. Step 4: Simplify right side
    1,419.49x = 1,027,569.24
  5. Step 5: Solve for x
    x = 1,027,569.24/1,419.49
  6. Step 6: Final answer
    x = 723.90

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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.