Home / 812,690.64-1,219,116.14-280,141.56

Finding the Fourth Proportional to 812,690.64, 1,219,116.14 and 280,141.56

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Solution

The fourth proportional to 812,690.64, 1,219,116.14 and 280,141.56 is: 420,239.98

Step by Step Solution

  1. Step 1: Write the proportion equation
    812,690.64 : 1,219,116.14 = 280,141.56 : x
  2. Step 2: Convert to fraction form
    812,690.64/1,219,116.14 = 280,141.56/x
  3. Step 3: Cross multiply
    812,690.64x = 1,219,116.14 × 280,141.56
  4. Step 4: Simplify right side
    812,690.64x = 341,525,097,280.78
  5. Step 5: Solve for x
    x = 341,525,097,280.78/812,690.64
  6. Step 6: Final answer
    x = 420,239.98

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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.