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Finding the Fourth Proportional to 391,598.46, 540,387.63 and 221,833.98

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Solution

The fourth proportional to 391,598.46, 540,387.63 and 221,833.98 is: 306,120.56

Step by Step Solution

  1. Step 1: Write the proportion equation
    391,598.46 : 540,387.63 = 221,833.98 : x
  2. Step 2: Convert to fraction form
    391,598.46/540,387.63 = 221,833.98/x
  3. Step 3: Cross multiply
    391,598.46x = 540,387.63 × 221,833.98
  4. Step 4: Simplify right side
    391,598.46x = 119,876,338,705.67
  5. Step 5: Solve for x
    x = 119,876,338,705.67/391,598.46
  6. Step 6: Final answer
    x = 306,120.56

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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.