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Finding the Fourth Proportional to 418,881.78, 628,361.61 and 169,583.22

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Solution

The fourth proportional to 418,881.78, 628,361.61 and 169,583.22 is: 254,390.59

Step by Step Solution

  1. Step 1: Write the proportion equation
    418,881.78 : 628,361.61 = 169,583.22 : x
  2. Step 2: Convert to fraction form
    418,881.78/628,361.61 = 169,583.22/x
  3. Step 3: Cross multiply
    418,881.78x = 628,361.61 × 169,583.22
  4. Step 4: Simplify right side
    418,881.78x = 106,559,585,148.18
  5. Step 5: Solve for x
    x = 106,559,585,148.18/418,881.78
  6. Step 6: Final answer
    x = 254,390.59

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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.