Home / 812,972.70-1,121,450.29-640,254.38

Finding the Fourth Proportional to 812,972.70, 1,121,450.29 and 640,254.38

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Solution

The fourth proportional to 812,972.70, 1,121,450.29 and 640,254.38 is: 883,195.04

Step by Step Solution

  1. Step 1: Write the proportion equation
    812,972.70 : 1,121,450.29 = 640,254.38 : x
  2. Step 2: Convert to fraction form
    812,972.70/1,121,450.29 = 640,254.38/x
  3. Step 3: Cross multiply
    812,972.70x = 1,121,450.29 × 640,254.38
  4. Step 4: Simplify right side
    812,972.70x = 718,013,452,916.88
  5. Step 5: Solve for x
    x = 718,013,452,916.88/812,972.70
  6. Step 6: Final answer
    x = 883,195.04

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.