Home / 812,719.82-1,219,159.93-280,170.74

Finding the Fourth Proportional to 812,719.82, 1,219,159.93 and 280,170.74

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Solution

The fourth proportional to 812,719.82, 1,219,159.93 and 280,170.74 is: 420,283.76

Step by Step Solution

  1. Step 1: Write the proportion equation
    812,719.82 : 1,219,159.93 = 280,170.74 : x
  2. Step 2: Convert to fraction form
    812,719.82/1,219,159.93 = 280,170.74/x
  3. Step 3: Cross multiply
    812,719.82x = 1,219,159.93 × 280,170.74
  4. Step 4: Simplify right side
    812,719.82x = 341,572,942,113.92
  5. Step 5: Solve for x
    x = 341,572,942,113.92/812,719.82
  6. Step 6: Final answer
    x = 420,283.76

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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.