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Finding the Fourth Proportional to 399,422.76, 550,950.30 and 303,719.64

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Solution

The fourth proportional to 399,422.76, 550,950.30 and 303,719.64 is: 418,940.64

Step by Step Solution

  1. Step 1: Write the proportion equation
    399,422.76 : 550,950.30 = 303,719.64 : x
  2. Step 2: Convert to fraction form
    399,422.76/550,950.30 = 303,719.64/x
  3. Step 3: Cross multiply
    399,422.76x = 550,950.30 × 303,719.64
  4. Step 4: Simplify right side
    399,422.76x = 167,334,426,773.89
  5. Step 5: Solve for x
    x = 167,334,426,773.89/399,422.76
  6. Step 6: Final answer
    x = 418,940.64

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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.