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Finding the Fourth Proportional to 386,169.78, 578,042.91 and 265,522.71

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Solution

The fourth proportional to 386,169.78, 578,042.91 and 265,522.71 is: 397,450.88

Step by Step Solution

  1. Step 1: Write the proportion equation
    386,169.78 : 578,042.91 = 265,522.71 : x
  2. Step 2: Convert to fraction form
    386,169.78/578,042.91 = 265,522.71/x
  3. Step 3: Cross multiply
    386,169.78x = 578,042.91 × 265,522.71
  4. Step 4: Simplify right side
    386,169.78x = 153,483,519,959.49
  5. Step 5: Solve for x
    x = 153,483,519,959.49/386,169.78
  6. Step 6: Final answer
    x = 397,450.88

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Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.