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Finding the Fourth Proportional to 258,406.20, 387,450.54 and 100,450.53

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Solution

The fourth proportional to 258,406.20, 387,450.54 and 100,450.53 is: 150,614.08

Step by Step Solution

  1. Step 1: Write the proportion equation
    258,406.20 : 387,450.54 = 100,450.53 : x
  2. Step 2: Convert to fraction form
    258,406.20/387,450.54 = 100,450.53/x
  3. Step 3: Cross multiply
    258,406.20x = 387,450.54 × 100,450.53
  4. Step 4: Simplify right side
    258,406.20x = 38,919,612,091.79
  5. Step 5: Solve for x
    x = 38,919,612,091.79/258,406.20
  6. Step 6: Final answer
    x = 150,614.08

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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.