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Finding the Fourth Proportional to 394,346.88, 543,561.13 and 308,156.10

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Solution

The fourth proportional to 394,346.88, 543,561.13 and 308,156.10 is: 424,757.20

Step by Step Solution

  1. Step 1: Write the proportion equation
    394,346.88 : 543,561.13 = 308,156.10 : x
  2. Step 2: Convert to fraction form
    394,346.88/543,561.13 = 308,156.10/x
  3. Step 3: Cross multiply
    394,346.88x = 543,561.13 × 308,156.10
  4. Step 4: Simplify right side
    394,346.88x = 167,501,676,279.23
  5. Step 5: Solve for x
    x = 167,501,676,279.23/394,346.88
  6. Step 6: Final answer
    x = 424,757.20

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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.