Home / 1,318.30-1,977.55-344.39

Finding the Fourth Proportional to 1,318.30, 1,977.55 and 344.39

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Solution

The fourth proportional to 1,318.30, 1,977.55 and 344.39 is: 516.60

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,318.30 : 1,977.55 = 344.39 : x
  2. Step 2: Convert to fraction form
    1,318.30/1,977.55 = 344.39/x
  3. Step 3: Cross multiply
    1,318.30x = 1,977.55 × 344.39
  4. Step 4: Simplify right side
    1,318.30x = 681,037.70
  5. Step 5: Solve for x
    x = 681,037.70/1,318.30
  6. Step 6: Final answer
    x = 516.60

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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.