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Finding the Fourth Proportional to 258,445.29, 387,675.24 and 71,456.79

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Solution

The fourth proportional to 258,445.29, 387,675.24 and 71,456.79 is: 107,187.20

Step by Step Solution

  1. Step 1: Write the proportion equation
    258,445.29 : 387,675.24 = 71,456.79 : x
  2. Step 2: Convert to fraction form
    258,445.29/387,675.24 = 71,456.79/x
  3. Step 3: Cross multiply
    258,445.29x = 387,675.24 × 71,456.79
  4. Step 4: Simplify right side
    258,445.29x = 27,702,028,212.88
  5. Step 5: Solve for x
    x = 27,702,028,212.88/258,445.29
  6. Step 6: Final answer
    x = 107,187.20

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1.5x scale

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.