Home / 1,316.67-1,974.78-439.77

Finding the Fourth Proportional to 1,316.67, 1,974.78 and 439.77

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Solution

The fourth proportional to 1,316.67, 1,974.78 and 439.77 is: 659.59

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,316.67 : 1,974.78 = 439.77 : x
  2. Step 2: Convert to fraction form
    1,316.67/1,974.78 = 439.77/x
  3. Step 3: Cross multiply
    1,316.67x = 1,974.78 × 439.77
  4. Step 4: Simplify right side
    1,316.67x = 868,456.41
  5. Step 5: Solve for x
    x = 868,456.41/1,316.67
  6. Step 6: Final answer
    x = 659.59

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1.5x scale

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.