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Finding the Fourth Proportional to 2,972.80, 4,454.40 and 2,483.20

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Solution

The fourth proportional to 2,972.80, 4,454.40 and 2,483.20 is: 3,720.79

Step by Step Solution

  1. Step 1: Write the proportion equation
    2,972.80 : 4,454.40 = 2,483.20 : x
  2. Step 2: Convert to fraction form
    2,972.80/4,454.40 = 2,483.20/x
  3. Step 3: Cross multiply
    2,972.80x = 4,454.40 × 2,483.20
  4. Step 4: Simplify right side
    2,972.80x = 11,061,166.08
  5. Step 5: Solve for x
    x = 11,061,166.08/2,972.80
  6. Step 6: Final answer
    x = 3,720.79

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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.