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Finding the Fourth Proportional to 653,875.70, 980,813.55 and 338,429.30

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Solution

The fourth proportional to 653,875.70, 980,813.55 and 338,429.30 is: 507,643.95

Step by Step Solution

  1. Step 1: Write the proportion equation
    653,875.70 : 980,813.55 = 338,429.30 : x
  2. Step 2: Convert to fraction form
    653,875.70/980,813.55 = 338,429.30/x
  3. Step 3: Cross multiply
    653,875.70x = 980,813.55 × 338,429.30
  4. Step 4: Simplify right side
    653,875.70x = 331,936,043,157.02
  5. Step 5: Solve for x
    x = 331,936,043,157.02/653,875.70
  6. Step 6: Final answer
    x = 507,643.95

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Double scale
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Similar ratio
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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.