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Finding the Fourth Proportional to 438,596.38, 657,205.66 and 339,000.40

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Solution

The fourth proportional to 438,596.38, 657,205.66 and 339,000.40 is: 507,968.13

Step by Step Solution

  1. Step 1: Write the proportion equation
    438,596.38 : 657,205.66 = 339,000.40 : x
  2. Step 2: Convert to fraction form
    438,596.38/657,205.66 = 339,000.40/x
  3. Step 3: Cross multiply
    438,596.38x = 657,205.66 × 339,000.40
  4. Step 4: Simplify right side
    438,596.38x = 222,792,981,622.26
  5. Step 5: Solve for x
    x = 222,792,981,622.26/438,596.38
  6. Step 6: Final answer
    x = 507,968.13

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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.