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Finding the Fourth Proportional to 480,685.20, 663,145.21 and 276,687.30

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Solution

The fourth proportional to 480,685.20, 663,145.21 and 276,687.30 is: 381,713.14

Step by Step Solution

  1. Step 1: Write the proportion equation
    480,685.20 : 663,145.21 = 276,687.30 : x
  2. Step 2: Convert to fraction form
    480,685.20/663,145.21 = 276,687.30/x
  3. Step 3: Cross multiply
    480,685.20x = 663,145.21 × 276,687.30
  4. Step 4: Simplify right side
    480,685.20x = 183,483,857,662.83
  5. Step 5: Solve for x
    x = 183,483,857,662.83/480,685.20
  6. Step 6: Final answer
    x = 381,713.14

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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.