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Finding the Fourth Proportional to 3,387.90, 4,675.90 and 1,972.02

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Solution

The fourth proportional to 3,387.90, 4,675.90 and 1,972.02 is: 2,721.74

Step by Step Solution

  1. Step 1: Write the proportion equation
    3,387.90 : 4,675.90 = 1,972.02 : x
  2. Step 2: Convert to fraction form
    3,387.90/4,675.90 = 1,972.02/x
  3. Step 3: Cross multiply
    3,387.90x = 4,675.90 × 1,972.02
  4. Step 4: Simplify right side
    3,387.90x = 9,220,977.02
  5. Step 5: Solve for x
    x = 9,220,977.02/3,387.90
  6. Step 6: Final answer
    x = 2,721.74

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1.5x scale

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.