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Finding the Fourth Proportional to 281,775.64, 388,859.88 and 154,451.20

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Solution

The fourth proportional to 281,775.64, 388,859.88 and 154,451.20 is: 213,147.86

Step by Step Solution

  1. Step 1: Write the proportion equation
    281,775.64 : 388,859.88 = 154,451.20 : x
  2. Step 2: Convert to fraction form
    281,775.64/388,859.88 = 154,451.20/x
  3. Step 3: Cross multiply
    281,775.64x = 388,859.88 × 154,451.20
  4. Step 4: Simplify right side
    281,775.64x = 60,059,875,097.86
  5. Step 5: Solve for x
    x = 60,059,875,097.86/281,775.64
  6. Step 6: Final answer
    x = 213,147.86

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.