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Finding the Fourth Proportional to 1,947.60, 2,920.08 and 1,022.40

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Solution

The fourth proportional to 1,947.60, 2,920.08 and 1,022.40 is: 1,532.91

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,947.60 : 2,920.08 = 1,022.40 : x
  2. Step 2: Convert to fraction form
    1,947.60/2,920.08 = 1,022.40/x
  3. Step 3: Cross multiply
    1,947.60x = 2,920.08 × 1,022.40
  4. Step 4: Simplify right side
    1,947.60x = 2,985,489.79
  5. Step 5: Solve for x
    x = 2,985,489.79/1,947.60
  6. Step 6: Final answer
    x = 1,532.91

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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.