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Finding the Fourth Proportional to 707,921.20, 993,578 and 707,921.20

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Solution

The fourth proportional to 707,921.20, 993,578 and 707,921.20 is: 993,578

Step by Step Solution

  1. Step 1: Write the proportion equation
    707,921.20 : 993,578 = 707,921.20 : x
  2. Step 2: Convert to fraction form
    707,921.20/993,578 = 707,921.20/x
  3. Step 3: Cross multiply
    707,921.20x = 993,578 × 707,921.20
  4. Step 4: Simplify right side
    707,921.20x = 703,374,930,053.60
  5. Step 5: Solve for x
    x = 703,374,930,053.60/707,921.20
  6. Step 6: Final answer
    x = 993,578

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.40) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.