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Finding the Fourth Proportional to 478,825.65, 660,786.72 and 261,034.47

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Solution

The fourth proportional to 478,825.65, 660,786.72 and 261,034.47 is: 360,231.56

Step by Step Solution

  1. Step 1: Write the proportion equation
    478,825.65 : 660,786.72 = 261,034.47 : x
  2. Step 2: Convert to fraction form
    478,825.65/660,786.72 = 261,034.47/x
  3. Step 3: Cross multiply
    478,825.65x = 660,786.72 × 261,034.47
  4. Step 4: Simplify right side
    478,825.65x = 172,488,111,238.24
  5. Step 5: Solve for x
    x = 172,488,111,238.24/478,825.65
  6. Step 6: Final answer
    x = 360,231.56

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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.