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Finding the Fourth Proportional to 391,502.38, 540,310.98 and 219,419.50

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Solution

The fourth proportional to 391,502.38, 540,310.98 and 219,419.50 is: 302,820.04

Step by Step Solution

  1. Step 1: Write the proportion equation
    391,502.38 : 540,310.98 = 219,419.50 : x
  2. Step 2: Convert to fraction form
    391,502.38/540,310.98 = 219,419.50/x
  3. Step 3: Cross multiply
    391,502.38x = 540,310.98 × 219,419.50
  4. Step 4: Simplify right side
    391,502.38x = 118,554,765,076.11
  5. Step 5: Solve for x
    x = 118,554,765,076.11/391,502.38
  6. Step 6: Final answer
    x = 302,820.04

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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.