Home / 812,721.70-1,121,543.59-445,195.90

Finding the Fourth Proportional to 812,721.70, 1,121,543.59 and 445,195.90

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Solution

The fourth proportional to 812,721.70, 1,121,543.59 and 445,195.90 is: 614,363.57

Step by Step Solution

  1. Step 1: Write the proportion equation
    812,721.70 : 1,121,543.59 = 445,195.90 : x
  2. Step 2: Convert to fraction form
    812,721.70/1,121,543.59 = 445,195.90/x
  3. Step 3: Cross multiply
    812,721.70x = 1,121,543.59 × 445,195.90
  4. Step 4: Simplify right side
    812,721.70x = 499,306,600,105.58
  5. Step 5: Solve for x
    x = 499,306,600,105.58/812,721.70
  6. Step 6: Final answer
    x = 614,363.57

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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.