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Finding the Fourth Proportional to 403,081.20, 605,087.40 and 216,457.20

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Solution

The fourth proportional to 403,081.20, 605,087.40 and 216,457.20 is: 324,935.83

Step by Step Solution

  1. Step 1: Write the proportion equation
    403,081.20 : 605,087.40 = 216,457.20 : x
  2. Step 2: Convert to fraction form
    403,081.20/605,087.40 = 216,457.20/x
  3. Step 3: Cross multiply
    403,081.20x = 605,087.40 × 216,457.20
  4. Step 4: Simplify right side
    403,081.20x = 130,975,524,359.28
  5. Step 5: Solve for x
    x = 130,975,524,359.28/403,081.20
  6. Step 6: Final answer
    x = 324,935.83

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Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.