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Finding the Fourth Proportional to 258,430.32, 387,570.60 and 100,623.60

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Solution

The fourth proportional to 258,430.32, 387,570.60 and 100,623.60 is: 150,906.24

Step by Step Solution

  1. Step 1: Write the proportion equation
    258,430.32 : 387,570.60 = 100,623.60 : x
  2. Step 2: Convert to fraction form
    258,430.32/387,570.60 = 100,623.60/x
  3. Step 3: Cross multiply
    258,430.32x = 387,570.60 × 100,623.60
  4. Step 4: Simplify right side
    258,430.32x = 38,998,749,026.16
  5. Step 5: Solve for x
    x = 38,998,749,026.16/258,430.32
  6. Step 6: Final answer
    x = 150,906.24

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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.