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Finding the Fourth Proportional to 258,463.72, 387,695.10 and 80,984.32

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Solution

The fourth proportional to 258,463.72, 387,695.10 and 80,984.32 is: 121,476.33

Step by Step Solution

  1. Step 1: Write the proportion equation
    258,463.72 : 387,695.10 = 80,984.32 : x
  2. Step 2: Convert to fraction form
    258,463.72/387,695.10 = 80,984.32/x
  3. Step 3: Cross multiply
    258,463.72x = 387,695.10 × 80,984.32
  4. Step 4: Simplify right side
    258,463.72x = 31,397,224,040.83
  5. Step 5: Solve for x
    x = 31,397,224,040.83/258,463.72
  6. Step 6: Final answer
    x = 121,476.33

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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.