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Finding the Fourth Proportional to 403,617.60, 605,426.40 and 279,201.60

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Solution

The fourth proportional to 403,617.60, 605,426.40 and 279,201.60 is: 418,802.40

Step by Step Solution

  1. Step 1: Write the proportion equation
    403,617.60 : 605,426.40 = 279,201.60 : x
  2. Step 2: Convert to fraction form
    403,617.60/605,426.40 = 279,201.60/x
  3. Step 3: Cross multiply
    403,617.60x = 605,426.40 × 279,201.60
  4. Step 4: Simplify right side
    403,617.60x = 169,036,019,562.24
  5. Step 5: Solve for x
    x = 169,036,019,562.24/403,617.60
  6. Step 6: Final answer
    x = 418,802.40

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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.