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Finding the Fourth Proportional to 520,080.20, 780,145.90 and 271,248.20

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Solution

The fourth proportional to 520,080.20, 780,145.90 and 271,248.20 is: 406,885.65

Step by Step Solution

  1. Step 1: Write the proportion equation
    520,080.20 : 780,145.90 = 271,248.20 : x
  2. Step 2: Convert to fraction form
    520,080.20/780,145.90 = 271,248.20/x
  3. Step 3: Cross multiply
    520,080.20x = 780,145.90 × 271,248.20
  4. Step 4: Simplify right side
    520,080.20x = 211,613,171,112.38
  5. Step 5: Solve for x
    x = 211,613,171,112.38/520,080.20
  6. Step 6: Final answer
    x = 406,885.65

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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.