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Finding the Fourth Proportional to 1,742.70, 2,614.70 and 818.56

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Solution

The fourth proportional to 1,742.70, 2,614.70 and 818.56 is: 1,228.15

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,742.70 : 2,614.70 = 818.56 : x
  2. Step 2: Convert to fraction form
    1,742.70/2,614.70 = 818.56/x
  3. Step 3: Cross multiply
    1,742.70x = 2,614.70 × 818.56
  4. Step 4: Simplify right side
    1,742.70x = 2,140,288.83
  5. Step 5: Solve for x
    x = 2,140,288.83/1,742.70
  6. Step 6: Final answer
    x = 1,228.15

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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.