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Finding the Fourth Proportional to 2,419.52, 3,629.40 and 688

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Solution

The fourth proportional to 2,419.52, 3,629.40 and 688 is: 1,032.03

Step by Step Solution

  1. Step 1: Write the proportion equation
    2,419.52 : 3,629.40 = 688 : x
  2. Step 2: Convert to fraction form
    2,419.52/3,629.40 = 688/x
  3. Step 3: Cross multiply
    2,419.52x = 3,629.40 × 688
  4. Step 4: Simplify right side
    2,419.52x = 2,497,027.20
  5. Step 5: Solve for x
    x = 2,497,027.20/2,419.52
  6. Step 6: Final answer
    x = 1,032.03

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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.