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Finding the Fourth Proportional to 391,193.96, 539,810.34 and 310,816.04

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Solution

The fourth proportional to 391,193.96, 539,810.34 and 310,816.04 is: 428,896.48

Step by Step Solution

  1. Step 1: Write the proportion equation
    391,193.96 : 539,810.34 = 310,816.04 : x
  2. Step 2: Convert to fraction form
    391,193.96/539,810.34 = 310,816.04/x
  3. Step 3: Cross multiply
    391,193.96x = 539,810.34 × 310,816.04
  4. Step 4: Simplify right side
    391,193.96x = 167,781,712,229.85
  5. Step 5: Solve for x
    x = 167,781,712,229.85/391,193.96
  6. Step 6: Final answer
    x = 428,896.48

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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.