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Finding the Fourth Proportional to 718,444.28, 991,519.68 and 412,560.80

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Solution

The fourth proportional to 718,444.28, 991,519.68 and 412,560.80 is: 569,372.13

Step by Step Solution

  1. Step 1: Write the proportion equation
    718,444.28 : 991,519.68 = 412,560.80 : x
  2. Step 2: Convert to fraction form
    718,444.28/991,519.68 = 412,560.80/x
  3. Step 3: Cross multiply
    718,444.28x = 991,519.68 × 412,560.80
  4. Step 4: Simplify right side
    718,444.28x = 409,062,152,396.54
  5. Step 5: Solve for x
    x = 409,062,152,396.54/718,444.28
  6. Step 6: Final answer
    x = 569,372.13

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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.