Home / 1,316.06-1,974.45-391.61

Finding the Fourth Proportional to 1,316.06, 1,974.45 and 391.61

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Solution

The fourth proportional to 1,316.06, 1,974.45 and 391.61 is: 587.52

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,316.06 : 1,974.45 = 391.61 : x
  2. Step 2: Convert to fraction form
    1,316.06/1,974.45 = 391.61/x
  3. Step 3: Cross multiply
    1,316.06x = 1,974.45 × 391.61
  4. Step 4: Simplify right side
    1,316.06x = 773,204.49
  5. Step 5: Solve for x
    x = 773,204.49/1,316.06
  6. Step 6: Final answer
    x = 587.52

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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.