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Finding the Fourth Proportional to 397,505.50, 548,507.72 and 268,724.18

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Solution

The fourth proportional to 397,505.50, 548,507.72 and 268,724.18 is: 370,805.65

Step by Step Solution

  1. Step 1: Write the proportion equation
    397,505.50 : 548,507.72 = 268,724.18 : x
  2. Step 2: Convert to fraction form
    397,505.50/548,507.72 = 268,724.18/x
  3. Step 3: Cross multiply
    397,505.50x = 548,507.72 × 268,724.18
  4. Step 4: Simplify right side
    397,505.50x = 147,397,287,280.67
  5. Step 5: Solve for x
    x = 147,397,287,280.67/397,505.50
  6. Step 6: Final answer
    x = 370,805.65

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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.