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Finding the Fourth Proportional to 258,955.38, 388,454.40 and 71,966.88

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Solution

The fourth proportional to 258,955.38, 388,454.40 and 71,966.88 is: 107,956.25

Step by Step Solution

  1. Step 1: Write the proportion equation
    258,955.38 : 388,454.40 = 71,966.88 : x
  2. Step 2: Convert to fraction form
    258,955.38/388,454.40 = 71,966.88/x
  3. Step 3: Cross multiply
    258,955.38x = 388,454.40 × 71,966.88
  4. Step 4: Simplify right side
    258,955.38x = 27,955,851,190.27
  5. Step 5: Solve for x
    x = 27,955,851,190.27/258,955.38
  6. Step 6: Final answer
    x = 107,956.25

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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.