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Finding the Fourth Proportional to 3,248.52, 4,482.66 and 1,989

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Solution

The fourth proportional to 3,248.52, 4,482.66 and 1,989 is: 2,744.64

Step by Step Solution

  1. Step 1: Write the proportion equation
    3,248.52 : 4,482.66 = 1,989 : x
  2. Step 2: Convert to fraction form
    3,248.52/4,482.66 = 1,989/x
  3. Step 3: Cross multiply
    3,248.52x = 4,482.66 × 1,989
  4. Step 4: Simplify right side
    3,248.52x = 8,916,010.74
  5. Step 5: Solve for x
    x = 8,916,010.74/3,248.52
  6. Step 6: Final answer
    x = 2,744.64

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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.