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Finding the Fourth Proportional to 391,422.15, 540,153.43 and 230,287.59

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Solution

The fourth proportional to 391,422.15, 540,153.43 and 230,287.59 is: 317,791.50

Step by Step Solution

  1. Step 1: Write the proportion equation
    391,422.15 : 540,153.43 = 230,287.59 : x
  2. Step 2: Convert to fraction form
    391,422.15/540,153.43 = 230,287.59/x
  3. Step 3: Cross multiply
    391,422.15x = 540,153.43 × 230,287.59
  4. Step 4: Simplify right side
    391,422.15x = 124,390,631,049.22
  5. Step 5: Solve for x
    x = 124,390,631,049.22/391,422.15
  6. Step 6: Final answer
    x = 317,791.50

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.