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Finding the Fourth Proportional to 3,959.68, 5,939.60 and 1,038.08

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Solution

The fourth proportional to 3,959.68, 5,939.60 and 1,038.08 is: 1,557.14

Step by Step Solution

  1. Step 1: Write the proportion equation
    3,959.68 : 5,939.60 = 1,038.08 : x
  2. Step 2: Convert to fraction form
    3,959.68/5,939.60 = 1,038.08/x
  3. Step 3: Cross multiply
    3,959.68x = 5,939.60 × 1,038.08
  4. Step 4: Simplify right side
    3,959.68x = 6,165,779.97
  5. Step 5: Solve for x
    x = 6,165,779.97/3,959.68
  6. Step 6: Final answer
    x = 1,557.14

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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.