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Finding the Fourth Proportional to 2,581.24, 3,871.86 and 937.76

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Solution

The fourth proportional to 2,581.24, 3,871.86 and 937.76 is: 1,406.64

Step by Step Solution

  1. Step 1: Write the proportion equation
    2,581.24 : 3,871.86 = 937.76 : x
  2. Step 2: Convert to fraction form
    2,581.24/3,871.86 = 937.76/x
  3. Step 3: Cross multiply
    2,581.24x = 3,871.86 × 937.76
  4. Step 4: Simplify right side
    2,581.24x = 3,630,875.43
  5. Step 5: Solve for x
    x = 3,630,875.43/2,581.24
  6. Step 6: Final answer
    x = 1,406.64

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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.