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Finding the Fourth Proportional to 456,487.80, 684,731.70 and 279,340.80

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Solution

The fourth proportional to 456,487.80, 684,731.70 and 279,340.80 is: 419,011.20

Step by Step Solution

  1. Step 1: Write the proportion equation
    456,487.80 : 684,731.70 = 279,340.80 : x
  2. Step 2: Convert to fraction form
    456,487.80/684,731.70 = 279,340.80/x
  3. Step 3: Cross multiply
    456,487.80x = 684,731.70 × 279,340.80
  4. Step 4: Simplify right side
    456,487.80x = 191,273,500,863.36
  5. Step 5: Solve for x
    x = 191,273,500,863.36/456,487.80
  6. Step 6: Final answer
    x = 419,011.20

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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.