Home / 812,719.70-1,219,159.74-280,170.62

Finding the Fourth Proportional to 812,719.70, 1,219,159.74 and 280,170.62

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Solution

The fourth proportional to 812,719.70, 1,219,159.74 and 280,170.62 is: 420,283.57

Step by Step Solution

  1. Step 1: Write the proportion equation
    812,719.70 : 1,219,159.74 = 280,170.62 : x
  2. Step 2: Convert to fraction form
    812,719.70/1,219,159.74 = 280,170.62/x
  3. Step 3: Cross multiply
    812,719.70x = 1,219,159.74 × 280,170.62
  4. Step 4: Simplify right side
    812,719.70x = 341,572,740,234.84
  5. Step 5: Solve for x
    x = 341,572,740,234.84/812,719.70
  6. Step 6: Final answer
    x = 420,283.57

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1.5x scale

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.