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Finding the Fourth Proportional to 258,424.20, 387,348.30 and 100,600.20

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Solution

The fourth proportional to 258,424.20, 387,348.30 and 100,600.20 is: 150,788.19

Step by Step Solution

  1. Step 1: Write the proportion equation
    258,424.20 : 387,348.30 = 100,600.20 : x
  2. Step 2: Convert to fraction form
    258,424.20/387,348.30 = 100,600.20/x
  3. Step 3: Cross multiply
    258,424.20x = 387,348.30 × 100,600.20
  4. Step 4: Simplify right side
    258,424.20x = 38,967,316,449.66
  5. Step 5: Solve for x
    x = 38,967,316,449.66/258,424.20
  6. Step 6: Final answer
    x = 150,788.19

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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.