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Finding the Fourth Proportional to 391,156.43, 539,751.20 and 219,050.46

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Solution

The fourth proportional to 391,156.43, 539,751.20 and 219,050.46 is: 302,264.62

Step by Step Solution

  1. Step 1: Write the proportion equation
    391,156.43 : 539,751.20 = 219,050.46 : x
  2. Step 2: Convert to fraction form
    391,156.43/539,751.20 = 219,050.46/x
  3. Step 3: Cross multiply
    391,156.43x = 539,751.20 × 219,050.46
  4. Step 4: Simplify right side
    391,156.43x = 118,232,747,550.30
  5. Step 5: Solve for x
    x = 118,232,747,550.30/391,156.43
  6. Step 6: Final answer
    x = 302,264.62

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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.