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Finding the Fourth Proportional to 288,747.65, 398,474.40 and 159,679.45

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Solution

The fourth proportional to 288,747.65, 398,474.40 and 159,679.45 is: 220,359.10

Step by Step Solution

  1. Step 1: Write the proportion equation
    288,747.65 : 398,474.40 = 159,679.45 : x
  2. Step 2: Convert to fraction form
    288,747.65/398,474.40 = 159,679.45/x
  3. Step 3: Cross multiply
    288,747.65x = 398,474.40 × 159,679.45
  4. Step 4: Simplify right side
    288,747.65x = 63,628,172,034.89
  5. Step 5: Solve for x
    x = 63,628,172,034.89/288,747.65
  6. Step 6: Final answer
    x = 220,359.10

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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.