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Finding the Fourth Proportional to 612,851.82, 919,073.61 and 257,799.66

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Solution

The fourth proportional to 612,851.82, 919,073.61 and 257,799.66 is: 386,613.63

Step by Step Solution

  1. Step 1: Write the proportion equation
    612,851.82 : 919,073.61 = 257,799.66 : x
  2. Step 2: Convert to fraction form
    612,851.82/919,073.61 = 257,799.66/x
  3. Step 3: Cross multiply
    612,851.82x = 919,073.61 × 257,799.66
  4. Step 4: Simplify right side
    612,851.82x = 236,936,864,172.97
  5. Step 5: Solve for x
    x = 236,936,864,172.97/612,851.82
  6. Step 6: Final answer
    x = 386,613.63

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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.