Home / 1,318.30-1,977.29-344.38

Finding the Fourth Proportional to 1,318.30, 1,977.29 and 344.38

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Solution

The fourth proportional to 1,318.30, 1,977.29 and 344.38 is: 516.53

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,318.30 : 1,977.29 = 344.38 : x
  2. Step 2: Convert to fraction form
    1,318.30/1,977.29 = 344.38/x
  3. Step 3: Cross multiply
    1,318.30x = 1,977.29 × 344.38
  4. Step 4: Simplify right side
    1,318.30x = 680,939.13
  5. Step 5: Solve for x
    x = 680,939.13/1,318.30
  6. Step 6: Final answer
    x = 516.53

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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.