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Finding the Fourth Proportional to 480,684.20, 663,143.83 and 276,686.30

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Solution

The fourth proportional to 480,684.20, 663,143.83 and 276,686.30 is: 381,711.77

Step by Step Solution

  1. Step 1: Write the proportion equation
    480,684.20 : 663,143.83 = 276,686.30 : x
  2. Step 2: Convert to fraction form
    480,684.20/663,143.83 = 276,686.30/x
  3. Step 3: Cross multiply
    480,684.20x = 663,143.83 × 276,686.30
  4. Step 4: Simplify right side
    480,684.20x = 183,482,813,656.67
  5. Step 5: Solve for x
    x = 183,482,813,656.67/480,684.20
  6. Step 6: Final answer
    x = 381,711.77

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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.