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Finding the Fourth Proportional to 1,344.55, 1,856.23 and 872.87

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Solution

The fourth proportional to 1,344.55, 1,856.23 and 872.87 is: 1,205.05

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,344.55 : 1,856.23 = 872.87 : x
  2. Step 2: Convert to fraction form
    1,344.55/1,856.23 = 872.87/x
  3. Step 3: Cross multiply
    1,344.55x = 1,856.23 × 872.87
  4. Step 4: Simplify right side
    1,344.55x = 1,620,241.61
  5. Step 5: Solve for x
    x = 1,620,241.61/1,344.55
  6. Step 6: Final answer
    x = 1,205.05

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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.