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Finding the Fourth Proportional to 258,425.60, 387,651.20 and 134,009.60

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Solution

The fourth proportional to 258,425.60, 387,651.20 and 134,009.60 is: 201,021.04

Step by Step Solution

  1. Step 1: Write the proportion equation
    258,425.60 : 387,651.20 = 134,009.60 : x
  2. Step 2: Convert to fraction form
    258,425.60/387,651.20 = 134,009.60/x
  3. Step 3: Cross multiply
    258,425.60x = 387,651.20 × 134,009.60
  4. Step 4: Simplify right side
    258,425.60x = 51,948,982,251.52
  5. Step 5: Solve for x
    x = 51,948,982,251.52/258,425.60
  6. Step 6: Final answer
    x = 201,021.04

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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.