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Finding the Fourth Proportional to 403,797.30, 605,015.55 and 319,233.30

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Solution

The fourth proportional to 403,797.30, 605,015.55 and 319,233.30 is: 478,312.04

Step by Step Solution

  1. Step 1: Write the proportion equation
    403,797.30 : 605,015.55 = 319,233.30 : x
  2. Step 2: Convert to fraction form
    403,797.30/605,015.55 = 319,233.30/x
  3. Step 3: Cross multiply
    403,797.30x = 605,015.55 × 319,233.30
  4. Step 4: Simplify right side
    403,797.30x = 193,141,110,577.82
  5. Step 5: Solve for x
    x = 193,141,110,577.82/403,797.30
  6. Step 6: Final answer
    x = 478,312.04

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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.