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Finding the Fourth Proportional to 391,708.88, 540,359.28 and 255,822.36

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Solution

The fourth proportional to 391,708.88, 540,359.28 and 255,822.36 is: 352,904.91

Step by Step Solution

  1. Step 1: Write the proportion equation
    391,708.88 : 540,359.28 = 255,822.36 : x
  2. Step 2: Convert to fraction form
    391,708.88/540,359.28 = 255,822.36/x
  3. Step 3: Cross multiply
    391,708.88x = 540,359.28 × 255,822.36
  4. Step 4: Simplify right side
    391,708.88x = 138,235,986,257.50
  5. Step 5: Solve for x
    x = 138,235,986,257.50/391,708.88
  6. Step 6: Final answer
    x = 352,904.91

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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.