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Finding the Fourth Proportional to 918,019, 1,266,985.02 and 515,611

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Solution

The fourth proportional to 918,019, 1,266,985.02 and 515,611 is: 711,609.90

Step by Step Solution

  1. Step 1: Write the proportion equation
    918,019 : 1,266,985.02 = 515,611 : x
  2. Step 2: Convert to fraction form
    918,019/1,266,985.02 = 515,611/x
  3. Step 3: Cross multiply
    918,019x = 1,266,985.02 × 515,611
  4. Step 4: Simplify right side
    918,019x = 653,271,413,147.22
  5. Step 5: Solve for x
    x = 653,271,413,147.22/918,019
  6. Step 6: Final answer
    x = 711,609.90

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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.