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Finding the Fourth Proportional to 2,974.40, 4,465.20 and 1,659.20

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Solution

The fourth proportional to 2,974.40, 4,465.20 and 1,659.20 is: 2,490.81

Step by Step Solution

  1. Step 1: Write the proportion equation
    2,974.40 : 4,465.20 = 1,659.20 : x
  2. Step 2: Convert to fraction form
    2,974.40/4,465.20 = 1,659.20/x
  3. Step 3: Cross multiply
    2,974.40x = 4,465.20 × 1,659.20
  4. Step 4: Simplify right side
    2,974.40x = 7,408,659.84
  5. Step 5: Solve for x
    x = 7,408,659.84/2,974.40
  6. Step 6: Final answer
    x = 2,490.81

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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.