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Finding the Fourth Proportional to 639,410.10, 957,851.55 and 414,926.70

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Solution

The fourth proportional to 639,410.10, 957,851.55 and 414,926.70 is: 621,570.07

Step by Step Solution

  1. Step 1: Write the proportion equation
    639,410.10 : 957,851.55 = 414,926.70 : x
  2. Step 2: Convert to fraction form
    639,410.10/957,851.55 = 414,926.70/x
  3. Step 3: Cross multiply
    639,410.10x = 957,851.55 × 414,926.70
  4. Step 4: Simplify right side
    639,410.10x = 397,438,182,731.39
  5. Step 5: Solve for x
    x = 397,438,182,731.39/639,410.10
  6. Step 6: Final answer
    x = 621,570.07

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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.