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Finding the Fourth Proportional to 618,959.58, 928,701.90 and 338,148.78

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Solution

The fourth proportional to 618,959.58, 928,701.90 and 338,148.78 is: 507,366.59

Step by Step Solution

  1. Step 1: Write the proportion equation
    618,959.58 : 928,701.90 = 338,148.78 : x
  2. Step 2: Convert to fraction form
    618,959.58/928,701.90 = 338,148.78/x
  3. Step 3: Cross multiply
    618,959.58x = 928,701.90 × 338,148.78
  4. Step 4: Simplify right side
    618,959.58x = 314,039,414,468.68
  5. Step 5: Solve for x
    x = 314,039,414,468.68/618,959.58
  6. Step 6: Final answer
    x = 507,366.59

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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.