Home / 812,920.90-1,121,899.76-450,458.46

Finding the Fourth Proportional to 812,920.90, 1,121,899.76 and 450,458.46

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Solution

The fourth proportional to 812,920.90, 1,121,899.76 and 450,458.46 is: 621,670.86

Step by Step Solution

  1. Step 1: Write the proportion equation
    812,920.90 : 1,121,899.76 = 450,458.46 : x
  2. Step 2: Convert to fraction form
    812,920.90/1,121,899.76 = 450,458.46/x
  3. Step 3: Cross multiply
    812,920.90x = 1,121,899.76 × 450,458.46
  4. Step 4: Simplify right side
    812,920.90x = 505,369,238,163.97
  5. Step 5: Solve for x
    x = 505,369,238,163.97/812,920.90
  6. Step 6: Final answer
    x = 621,670.86

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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.