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Finding the Fourth Proportional to 403,843.40, 605,246.70 and 245,904.20

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Solution

The fourth proportional to 403,843.40, 605,246.70 and 245,904.20 is: 368,540.64

Step by Step Solution

  1. Step 1: Write the proportion equation
    403,843.40 : 605,246.70 = 245,904.20 : x
  2. Step 2: Convert to fraction form
    403,843.40/605,246.70 = 245,904.20/x
  3. Step 3: Cross multiply
    403,843.40x = 605,246.70 × 245,904.20
  4. Step 4: Simplify right side
    403,843.40x = 148,832,705,566.14
  5. Step 5: Solve for x
    x = 148,832,705,566.14/403,843.40
  6. Step 6: Final answer
    x = 368,540.64

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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.