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Finding the Fourth Proportional to 3,246.58, 4,479.96 and 1,988

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Solution

The fourth proportional to 3,246.58, 4,479.96 and 1,988 is: 2,743.24

Step by Step Solution

  1. Step 1: Write the proportion equation
    3,246.58 : 4,479.96 = 1,988 : x
  2. Step 2: Convert to fraction form
    3,246.58/4,479.96 = 1,988/x
  3. Step 3: Cross multiply
    3,246.58x = 4,479.96 × 1,988
  4. Step 4: Simplify right side
    3,246.58x = 8,906,160.48
  5. Step 5: Solve for x
    x = 8,906,160.48/3,246.58
  6. Step 6: Final answer
    x = 2,743.24

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Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.