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Finding the Fourth Proportional to 3,147.54, 4,721.04 and 1,298.20

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Solution

The fourth proportional to 3,147.54, 4,721.04 and 1,298.20 is: 1,947.19

Step by Step Solution

  1. Step 1: Write the proportion equation
    3,147.54 : 4,721.04 = 1,298.20 : x
  2. Step 2: Convert to fraction form
    3,147.54/4,721.04 = 1,298.20/x
  3. Step 3: Cross multiply
    3,147.54x = 4,721.04 × 1,298.20
  4. Step 4: Simplify right side
    3,147.54x = 6,128,854.13
  5. Step 5: Solve for x
    x = 6,128,854.13/3,147.54
  6. Step 6: Final answer
    x = 1,947.19

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1.5x scale

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.