Home / 1,318.25-1,977.37-344.35

Finding the Fourth Proportional to 1,318.25, 1,977.37 and 344.35

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Solution

The fourth proportional to 1,318.25, 1,977.37 and 344.35 is: 516.52

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,318.25 : 1,977.37 = 344.35 : x
  2. Step 2: Convert to fraction form
    1,318.25/1,977.37 = 344.35/x
  3. Step 3: Cross multiply
    1,318.25x = 1,977.37 × 344.35
  4. Step 4: Simplify right side
    1,318.25x = 680,901.56
  5. Step 5: Solve for x
    x = 680,901.56/1,318.25
  6. Step 6: Final answer
    x = 516.52

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Double scale
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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.