Home / 261,272.88-391,975.12-74,284.38

Finding the Fourth Proportional to 261,272.88, 391,975.12 and 74,284.38

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Solution

The fourth proportional to 261,272.88, 391,975.12 and 74,284.38 is: 111,445.28

Step by Step Solution

  1. Step 1: Write the proportion equation
    261,272.88 : 391,975.12 = 74,284.38 : x
  2. Step 2: Convert to fraction form
    261,272.88/391,975.12 = 74,284.38/x
  3. Step 3: Cross multiply
    261,272.88x = 391,975.12 × 74,284.38
  4. Step 4: Simplify right side
    261,272.88x = 29,117,628,764.63
  5. Step 5: Solve for x
    x = 29,117,628,764.63/261,272.88
  6. Step 6: Final answer
    x = 111,445.28

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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.