Home / 812,920.15-1,121,829.86-445,398.85

Finding the Fourth Proportional to 812,920.15, 1,121,829.86 and 445,398.85

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Solution

The fourth proportional to 812,920.15, 1,121,829.86 and 445,398.85 is: 614,650.44

Step by Step Solution

  1. Step 1: Write the proportion equation
    812,920.15 : 1,121,829.86 = 445,398.85 : x
  2. Step 2: Convert to fraction form
    812,920.15/1,121,829.86 = 445,398.85/x
  3. Step 3: Cross multiply
    812,920.15x = 1,121,829.86 × 445,398.85
  4. Step 4: Simplify right side
    812,920.15x = 499,661,721,703.52
  5. Step 5: Solve for x
    x = 499,661,721,703.52/812,920.15
  6. Step 6: Final answer
    x = 614,650.44

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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.