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Finding the Fourth Proportional to 442,896.90, 664,442.55 and 143,391.30

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Solution

The fourth proportional to 442,896.90, 664,442.55 and 143,391.30 is: 215,118.42

Step by Step Solution

  1. Step 1: Write the proportion equation
    442,896.90 : 664,442.55 = 143,391.30 : x
  2. Step 2: Convert to fraction form
    442,896.90/664,442.55 = 143,391.30/x
  3. Step 3: Cross multiply
    442,896.90x = 664,442.55 × 143,391.30
  4. Step 4: Simplify right side
    442,896.90x = 95,275,281,019.82
  5. Step 5: Solve for x
    x = 95,275,281,019.82/442,896.90
  6. Step 6: Final answer
    x = 215,118.42

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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.