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Finding the Fourth Proportional to 265,904.80, 398,857.20 and 225,815.20

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Solution

The fourth proportional to 265,904.80, 398,857.20 and 225,815.20 is: 338,722.80

Step by Step Solution

  1. Step 1: Write the proportion equation
    265,904.80 : 398,857.20 = 225,815.20 : x
  2. Step 2: Convert to fraction form
    265,904.80/398,857.20 = 225,815.20/x
  3. Step 3: Cross multiply
    265,904.80x = 398,857.20 × 225,815.20
  4. Step 4: Simplify right side
    265,904.80x = 90,068,018,389.44
  5. Step 5: Solve for x
    x = 90,068,018,389.44/265,904.80
  6. Step 6: Final answer
    x = 338,722.80

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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.