Home / 1,316.33-1,974.69-438.55

Finding the Fourth Proportional to 1,316.33, 1,974.69 and 438.55

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Solution

The fourth proportional to 1,316.33, 1,974.69 and 438.55 is: 657.88

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,316.33 : 1,974.69 = 438.55 : x
  2. Step 2: Convert to fraction form
    1,316.33/1,974.69 = 438.55/x
  3. Step 3: Cross multiply
    1,316.33x = 1,974.69 × 438.55
  4. Step 4: Simplify right side
    1,316.33x = 865,990.43
  5. Step 5: Solve for x
    x = 865,990.43/1,316.33
  6. Step 6: Final answer
    x = 657.88

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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.