Home / 1,316.24-1,974.54-391.87

Finding the Fourth Proportional to 1,316.24, 1,974.54 and 391.87

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Solution

The fourth proportional to 1,316.24, 1,974.54 and 391.87 is: 587.86

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,316.24 : 1,974.54 = 391.87 : x
  2. Step 2: Convert to fraction form
    1,316.24/1,974.54 = 391.87/x
  3. Step 3: Cross multiply
    1,316.24x = 1,974.54 × 391.87
  4. Step 4: Simplify right side
    1,316.24x = 773,762.99
  5. Step 5: Solve for x
    x = 773,762.99/1,316.24
  6. Step 6: Final answer
    x = 587.86

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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.