Home / 1,318.40-1,977.57-344.47

Finding the Fourth Proportional to 1,318.40, 1,977.57 and 344.47

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Solution

The fourth proportional to 1,318.40, 1,977.57 and 344.47 is: 516.70

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,318.40 : 1,977.57 = 344.47 : x
  2. Step 2: Convert to fraction form
    1,318.40/1,977.57 = 344.47/x
  3. Step 3: Cross multiply
    1,318.40x = 1,977.57 × 344.47
  4. Step 4: Simplify right side
    1,318.40x = 681,213.54
  5. Step 5: Solve for x
    x = 681,213.54/1,318.40
  6. Step 6: Final answer
    x = 516.70

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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.