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Finding the Fourth Proportional to 479,164.17, 661,220.57 and 275,215.15

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Solution

The fourth proportional to 479,164.17, 661,220.57 and 275,215.15 is: 379,781.98

Step by Step Solution

  1. Step 1: Write the proportion equation
    479,164.17 : 661,220.57 = 275,215.15 : x
  2. Step 2: Convert to fraction form
    479,164.17/661,220.57 = 275,215.15/x
  3. Step 3: Cross multiply
    479,164.17x = 661,220.57 × 275,215.15
  4. Step 4: Simplify right side
    479,164.17x = 181,977,916,693.65
  5. Step 5: Solve for x
    x = 181,977,916,693.65/479,164.17
  6. Step 6: Final answer
    x = 379,781.98

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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.