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Finding the Fourth Proportional to 764,958.13, 1,055,661.91 and 420,802.90

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Solution

The fourth proportional to 764,958.13, 1,055,661.91 and 420,802.90 is: 580,718.83

Step by Step Solution

  1. Step 1: Write the proportion equation
    764,958.13 : 1,055,661.91 = 420,802.90 : x
  2. Step 2: Convert to fraction form
    764,958.13/1,055,661.91 = 420,802.90/x
  3. Step 3: Cross multiply
    764,958.13x = 1,055,661.91 × 420,802.90
  4. Step 4: Simplify right side
    764,958.13x = 444,225,591,823.39
  5. Step 5: Solve for x
    x = 444,225,591,823.39/764,958.13
  6. Step 6: Final answer
    x = 580,718.83

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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.