Home / 1,316.56-1,974.82-392.12

Finding the Fourth Proportional to 1,316.56, 1,974.82 and 392.12

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Solution

The fourth proportional to 1,316.56, 1,974.82 and 392.12 is: 588.18

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,316.56 : 1,974.82 = 392.12 : x
  2. Step 2: Convert to fraction form
    1,316.56/1,974.82 = 392.12/x
  3. Step 3: Cross multiply
    1,316.56x = 1,974.82 × 392.12
  4. Step 4: Simplify right side
    1,316.56x = 774,371.11
  5. Step 5: Solve for x
    x = 774,371.11/1,316.56
  6. Step 6: Final answer
    x = 588.18

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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.