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Finding the Fourth Proportional to 258,891.56, 388,381.62 and 118,662.20

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Solution

The fourth proportional to 258,891.56, 388,381.62 and 118,662.20 is: 178,013.60

Step by Step Solution

  1. Step 1: Write the proportion equation
    258,891.56 : 388,381.62 = 118,662.20 : x
  2. Step 2: Convert to fraction form
    258,891.56/388,381.62 = 118,662.20/x
  3. Step 3: Cross multiply
    258,891.56x = 388,381.62 × 118,662.20
  4. Step 4: Simplify right side
    258,891.56x = 46,086,217,468.76
  5. Step 5: Solve for x
    x = 46,086,217,468.76/258,891.56
  6. Step 6: Final answer
    x = 178,013.60

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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.