Home / 1,318.40-1,977.56-344.50

Finding the Fourth Proportional to 1,318.40, 1,977.56 and 344.50

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Solution

The fourth proportional to 1,318.40, 1,977.56 and 344.50 is: 516.74

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,318.40 : 1,977.56 = 344.50 : x
  2. Step 2: Convert to fraction form
    1,318.40/1,977.56 = 344.50/x
  3. Step 3: Cross multiply
    1,318.40x = 1,977.56 × 344.50
  4. Step 4: Simplify right side
    1,318.40x = 681,269.42
  5. Step 5: Solve for x
    x = 681,269.42/1,318.40
  6. Step 6: Final answer
    x = 516.74

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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.