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Finding the Fourth Proportional to 327,803.10, 490,867.86 and 261,340.16

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Solution

The fourth proportional to 327,803.10, 490,867.86 and 261,340.16 is: 391,343.11

Step by Step Solution

  1. Step 1: Write the proportion equation
    327,803.10 : 490,867.86 = 261,340.16 : x
  2. Step 2: Convert to fraction form
    327,803.10/490,867.86 = 261,340.16/x
  3. Step 3: Cross multiply
    327,803.10x = 490,867.86 × 261,340.16
  4. Step 4: Simplify right side
    327,803.10x = 128,283,485,071.26
  5. Step 5: Solve for x
    x = 128,283,485,071.26/327,803.10
  6. Step 6: Final answer
    x = 391,343.11

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1.5x scale

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.