Home / 812,689.89-1,219,115.02-280,140.81

Finding the Fourth Proportional to 812,689.89, 1,219,115.02 and 280,140.81

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Solution

The fourth proportional to 812,689.89, 1,219,115.02 and 280,140.81 is: 420,238.86

Step by Step Solution

  1. Step 1: Write the proportion equation
    812,689.89 : 1,219,115.02 = 280,140.81 : x
  2. Step 2: Convert to fraction form
    812,689.89/1,219,115.02 = 280,140.81/x
  3. Step 3: Cross multiply
    812,689.89x = 1,219,115.02 × 280,140.81
  4. Step 4: Simplify right side
    812,689.89x = 341,523,869,185.97
  5. Step 5: Solve for x
    x = 341,523,869,185.97/812,689.89
  6. Step 6: Final answer
    x = 420,238.86

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Double scale
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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.