Home / 1,318.28-1,818.96-1,025.76

Finding the Fourth Proportional to 1,318.28, 1,818.96 and 1,025.76

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Solution

The fourth proportional to 1,318.28, 1,818.96 and 1,025.76 is: 1,415.35

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,318.28 : 1,818.96 = 1,025.76 : x
  2. Step 2: Convert to fraction form
    1,318.28/1,818.96 = 1,025.76/x
  3. Step 3: Cross multiply
    1,318.28x = 1,818.96 × 1,025.76
  4. Step 4: Simplify right side
    1,318.28x = 1,865,819.38
  5. Step 5: Solve for x
    x = 1,865,819.38/1,318.28
  6. Step 6: Final answer
    x = 1,415.35

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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.