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Finding the Fourth Proportional to 418,782.62, 628,536.60 and 219,242.58

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Solution

The fourth proportional to 418,782.62, 628,536.60 and 219,242.58 is: 329,053.74

Step by Step Solution

  1. Step 1: Write the proportion equation
    418,782.62 : 628,536.60 = 219,242.58 : x
  2. Step 2: Convert to fraction form
    418,782.62/628,536.60 = 219,242.58/x
  3. Step 3: Cross multiply
    418,782.62x = 628,536.60 × 219,242.58
  4. Step 4: Simplify right side
    418,782.62x = 137,801,985,808.43
  5. Step 5: Solve for x
    x = 137,801,985,808.43/418,782.62
  6. Step 6: Final answer
    x = 329,053.74

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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.