Home / 812,718.73-1,121,502.54-450,120.88

Finding the Fourth Proportional to 812,718.73, 1,121,502.54 and 450,120.88

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Solution

The fourth proportional to 812,718.73, 1,121,502.54 and 450,120.88 is: 621,139.51

Step by Step Solution

  1. Step 1: Write the proportion equation
    812,718.73 : 1,121,502.54 = 450,120.88 : x
  2. Step 2: Convert to fraction form
    812,718.73/1,121,502.54 = 450,120.88/x
  3. Step 3: Cross multiply
    812,718.73x = 1,121,502.54 × 450,120.88
  4. Step 4: Simplify right side
    812,718.73x = 504,811,710,227.04
  5. Step 5: Solve for x
    x = 504,811,710,227.04/812,718.73
  6. Step 6: Final answer
    x = 621,139.51

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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.