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Finding the Fourth Proportional to 258,013.60, 386,145.60 and 226,520.80

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Solution

The fourth proportional to 258,013.60, 386,145.60 and 226,520.80 is: 339,013.18

Step by Step Solution

  1. Step 1: Write the proportion equation
    258,013.60 : 386,145.60 = 226,520.80 : x
  2. Step 2: Convert to fraction form
    258,013.60/386,145.60 = 226,520.80/x
  3. Step 3: Cross multiply
    258,013.60x = 386,145.60 × 226,520.80
  4. Step 4: Simplify right side
    258,013.60x = 87,470,010,228.48
  5. Step 5: Solve for x
    x = 87,470,010,228.48/258,013.60
  6. Step 6: Final answer
    x = 339,013.18

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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.