Home / 1,318.39-1,977.10-440.74

Finding the Fourth Proportional to 1,318.39, 1,977.10 and 440.74

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Solution

The fourth proportional to 1,318.39, 1,977.10 and 440.74 is: 660.95

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,318.39 : 1,977.10 = 440.74 : x
  2. Step 2: Convert to fraction form
    1,318.39/1,977.10 = 440.74/x
  3. Step 3: Cross multiply
    1,318.39x = 1,977.10 × 440.74
  4. Step 4: Simplify right side
    1,318.39x = 871,387.05
  5. Step 5: Solve for x
    x = 871,387.05/1,318.39
  6. Step 6: Final answer
    x = 660.95

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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.