Home / 1,316.25-1,974.42-438.48

Finding the Fourth Proportional to 1,316.25, 1,974.42 and 438.48

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Solution

The fourth proportional to 1,316.25, 1,974.42 and 438.48 is: 657.73

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,316.25 : 1,974.42 = 438.48 : x
  2. Step 2: Convert to fraction form
    1,316.25/1,974.42 = 438.48/x
  3. Step 3: Cross multiply
    1,316.25x = 1,974.42 × 438.48
  4. Step 4: Simplify right side
    1,316.25x = 865,743.68
  5. Step 5: Solve for x
    x = 865,743.68/1,316.25
  6. Step 6: Final answer
    x = 657.73

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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.