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Finding the Fourth Proportional to 1,344.40, 1,856.08 and 872.48

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Solution

The fourth proportional to 1,344.40, 1,856.08 and 872.48 is: 1,204.55

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,344.40 : 1,856.08 = 872.48 : x
  2. Step 2: Convert to fraction form
    1,344.40/1,856.08 = 872.48/x
  3. Step 3: Cross multiply
    1,344.40x = 1,856.08 × 872.48
  4. Step 4: Simplify right side
    1,344.40x = 1,619,392.68
  5. Step 5: Solve for x
    x = 1,619,392.68/1,344.40
  6. Step 6: Final answer
    x = 1,204.55

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.