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Finding the Fourth Proportional to 418,521.02, 627,798 and 218,705.72

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Solution

The fourth proportional to 418,521.02, 627,798 and 218,705.72 is: 328,067.19

Step by Step Solution

  1. Step 1: Write the proportion equation
    418,521.02 : 627,798 = 218,705.72 : x
  2. Step 2: Convert to fraction form
    418,521.02/627,798 = 218,705.72/x
  3. Step 3: Cross multiply
    418,521.02x = 627,798 × 218,705.72
  4. Step 4: Simplify right side
    418,521.02x = 137,303,013,604.56
  5. Step 5: Solve for x
    x = 137,303,013,604.56/418,521.02
  6. Step 6: Final answer
    x = 328,067.19

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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.