Home / 812,785.69-1,121,681.17-450,209.50

Finding the Fourth Proportional to 812,785.69, 1,121,681.17 and 450,209.50

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Solution

The fourth proportional to 812,785.69, 1,121,681.17 and 450,209.50 is: 621,309.56

Step by Step Solution

  1. Step 1: Write the proportion equation
    812,785.69 : 1,121,681.17 = 450,209.50 : x
  2. Step 2: Convert to fraction form
    812,785.69/1,121,681.17 = 450,209.50/x
  3. Step 3: Cross multiply
    812,785.69x = 1,121,681.17 × 450,209.50
  4. Step 4: Simplify right side
    812,785.69x = 504,991,518,705.12
  5. Step 5: Solve for x
    x = 504,991,518,705.12/812,785.69
  6. Step 6: Final answer
    x = 621,309.56

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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.