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Finding the Fourth Proportional to 679,072.58, 937,065.30 and 392,611.13

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Solution

The fourth proportional to 679,072.58, 937,065.30 and 392,611.13 is: 541,771.64

Step by Step Solution

  1. Step 1: Write the proportion equation
    679,072.58 : 937,065.30 = 392,611.13 : x
  2. Step 2: Convert to fraction form
    679,072.58/937,065.30 = 392,611.13/x
  3. Step 3: Cross multiply
    679,072.58x = 937,065.30 × 392,611.13
  4. Step 4: Simplify right side
    679,072.58x = 367,902,261,631.46
  5. Step 5: Solve for x
    x = 367,902,261,631.46/679,072.58
  6. Step 6: Final answer
    x = 541,771.64

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.