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Finding the Fourth Proportional to 618,965.58, 928,710.90 and 338,154.78

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Solution

The fourth proportional to 618,965.58, 928,710.90 and 338,154.78 is: 507,375.60

Step by Step Solution

  1. Step 1: Write the proportion equation
    618,965.58 : 928,710.90 = 338,154.78 : x
  2. Step 2: Convert to fraction form
    618,965.58/928,710.90 = 338,154.78/x
  3. Step 3: Cross multiply
    618,965.58x = 928,710.90 × 338,154.78
  4. Step 4: Simplify right side
    618,965.58x = 314,048,030,073.10
  5. Step 5: Solve for x
    x = 314,048,030,073.10/618,965.58
  6. Step 6: Final answer
    x = 507,375.60

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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.