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Finding the Fourth Proportional to 418,838.16, 628,254.36 and 169,516.56

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Solution

The fourth proportional to 418,838.16, 628,254.36 and 169,516.56 is: 254,273.67

Step by Step Solution

  1. Step 1: Write the proportion equation
    418,838.16 : 628,254.36 = 169,516.56 : x
  2. Step 2: Convert to fraction form
    418,838.16/628,254.36 = 169,516.56/x
  3. Step 3: Cross multiply
    418,838.16x = 628,254.36 × 169,516.56
  4. Step 4: Simplify right side
    418,838.16x = 106,499,517,912.20
  5. Step 5: Solve for x
    x = 106,499,517,912.20/418,838.16
  6. Step 6: Final answer
    x = 254,273.67

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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.