Home / 812,983.81-1,121,902.39-450,399.71

Finding the Fourth Proportional to 812,983.81, 1,121,902.39 and 450,399.71

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Solution

The fourth proportional to 812,983.81, 1,121,902.39 and 450,399.71 is: 621,543.13

Step by Step Solution

  1. Step 1: Write the proportion equation
    812,983.81 : 1,121,902.39 = 450,399.71 : x
  2. Step 2: Convert to fraction form
    812,983.81/1,121,902.39 = 450,399.71/x
  3. Step 3: Cross multiply
    812,983.81x = 1,121,902.39 × 450,399.71
  4. Step 4: Simplify right side
    812,983.81x = 505,304,504,368.80
  5. Step 5: Solve for x
    x = 505,304,504,368.80/812,983.81
  6. Step 6: Final answer
    x = 621,543.13

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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.