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Finding the Fourth Proportional to 261,314.75, 391,990.37 and 103,542.75

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Solution

The fourth proportional to 261,314.75, 391,990.37 and 103,542.75 is: 155,321.35

Step by Step Solution

  1. Step 1: Write the proportion equation
    261,314.75 : 391,990.37 = 103,542.75 : x
  2. Step 2: Convert to fraction form
    261,314.75/391,990.37 = 103,542.75/x
  3. Step 3: Cross multiply
    261,314.75x = 391,990.37 × 103,542.75
  4. Step 4: Simplify right side
    261,314.75x = 40,587,760,365.60
  5. Step 5: Solve for x
    x = 40,587,760,365.60/261,314.75
  6. Step 6: Final answer
    x = 155,321.35

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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.