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Finding the Fourth Proportional to 2,947.66, 4,420.80 and 867.11

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Solution

The fourth proportional to 2,947.66, 4,420.80 and 867.11 is: 1,300.46

Step by Step Solution

  1. Step 1: Write the proportion equation
    2,947.66 : 4,420.80 = 867.11 : x
  2. Step 2: Convert to fraction form
    2,947.66/4,420.80 = 867.11/x
  3. Step 3: Cross multiply
    2,947.66x = 4,420.80 × 867.11
  4. Step 4: Simplify right side
    2,947.66x = 3,833,293.45
  5. Step 5: Solve for x
    x = 3,833,293.45/2,947.66
  6. Step 6: Final answer
    x = 1,300.46

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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.