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Finding the Fourth Proportional to 398,655.80, 550,278.31 and 237,561.38

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Solution

The fourth proportional to 398,655.80, 550,278.31 and 237,561.38 is: 327,914.14

Step by Step Solution

  1. Step 1: Write the proportion equation
    398,655.80 : 550,278.31 = 237,561.38 : x
  2. Step 2: Convert to fraction form
    398,655.80/550,278.31 = 237,561.38/x
  3. Step 3: Cross multiply
    398,655.80x = 550,278.31 × 237,561.38
  4. Step 4: Simplify right side
    398,655.80x = 130,724,874,707.67
  5. Step 5: Solve for x
    x = 130,724,874,707.67/398,655.80
  6. Step 6: Final answer
    x = 327,914.14

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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.