Home / 812,369.26-1,120,716.64-489,900.16

Finding the Fourth Proportional to 812,369.26, 1,120,716.64 and 489,900.16

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Solution

The fourth proportional to 812,369.26, 1,120,716.64 and 489,900.16 is: 675,849.38

Step by Step Solution

  1. Step 1: Write the proportion equation
    812,369.26 : 1,120,716.64 = 489,900.16 : x
  2. Step 2: Convert to fraction form
    812,369.26/1,120,716.64 = 489,900.16/x
  3. Step 3: Cross multiply
    812,369.26x = 1,120,716.64 × 489,900.16
  4. Step 4: Simplify right side
    812,369.26x = 549,039,261,250.66
  5. Step 5: Solve for x
    x = 549,039,261,250.66/812,369.26
  6. Step 6: Final answer
    x = 675,849.38

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Double scale
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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.