Home / 2,947.38-4,421.75-867.40

Finding the Fourth Proportional to 2,947.38, 4,421.75 and 867.40

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Solution

The fourth proportional to 2,947.38, 4,421.75 and 867.40 is: 1,301.30

Step by Step Solution

  1. Step 1: Write the proportion equation
    2,947.38 : 4,421.75 = 867.40 : x
  2. Step 2: Convert to fraction form
    2,947.38/4,421.75 = 867.40/x
  3. Step 3: Cross multiply
    2,947.38x = 4,421.75 × 867.40
  4. Step 4: Simplify right side
    2,947.38x = 3,835,425.95
  5. Step 5: Solve for x
    x = 3,835,425.95/2,947.38
  6. Step 6: Final answer
    x = 1,301.30

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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.