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Finding the Fourth Proportional to 258,349.78, 356,528.82 and 143,631.91

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Solution

The fourth proportional to 258,349.78, 356,528.82 and 143,631.91 is: 198,215.44

Step by Step Solution

  1. Step 1: Write the proportion equation
    258,349.78 : 356,528.82 = 143,631.91 : x
  2. Step 2: Convert to fraction form
    258,349.78/356,528.82 = 143,631.91/x
  3. Step 3: Cross multiply
    258,349.78x = 356,528.82 × 143,631.91
  4. Step 4: Simplify right side
    258,349.78x = 51,208,915,386.65
  5. Step 5: Solve for x
    x = 51,208,915,386.65/258,349.78
  6. Step 6: Final answer
    x = 198,215.44

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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.