Home / 1,316.56-1,975.19-439.20

Finding the Fourth Proportional to 1,316.56, 1,975.19 and 439.20

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Solution

The fourth proportional to 1,316.56, 1,975.19 and 439.20 is: 658.92

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,316.56 : 1,975.19 = 439.20 : x
  2. Step 2: Convert to fraction form
    1,316.56/1,975.19 = 439.20/x
  3. Step 3: Cross multiply
    1,316.56x = 1,975.19 × 439.20
  4. Step 4: Simplify right side
    1,316.56x = 867,503.45
  5. Step 5: Solve for x
    x = 867,503.45/1,316.56
  6. Step 6: Final answer
    x = 658.92

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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.