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Finding the Fourth Proportional to 463,180, 639,188.40 and 261,971.68

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Solution

The fourth proportional to 463,180, 639,188.40 and 261,971.68 is: 361,520.92

Step by Step Solution

  1. Step 1: Write the proportion equation
    463,180 : 639,188.40 = 261,971.68 : x
  2. Step 2: Convert to fraction form
    463,180/639,188.40 = 261,971.68/x
  3. Step 3: Cross multiply
    463,180x = 639,188.40 × 261,971.68
  4. Step 4: Simplify right side
    463,180x = 167,449,258,984.51
  5. Step 5: Solve for x
    x = 167,449,258,984.51/463,180
  6. Step 6: Final answer
    x = 361,520.92

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.