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Finding the Fourth Proportional to 661,019.20, 991,552.28 and 211,681.68

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Solution

The fourth proportional to 661,019.20, 991,552.28 and 211,681.68 is: 317,530.04

Step by Step Solution

  1. Step 1: Write the proportion equation
    661,019.20 : 991,552.28 = 211,681.68 : x
  2. Step 2: Convert to fraction form
    661,019.20/991,552.28 = 211,681.68/x
  3. Step 3: Cross multiply
    661,019.20x = 991,552.28 × 211,681.68
  4. Step 4: Simplify right side
    661,019.20x = 209,893,452,438.23
  5. Step 5: Solve for x
    x = 209,893,452,438.23/661,019.20
  6. Step 6: Final answer
    x = 317,530.04

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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.