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Finding the Fourth Proportional to 378,000.90, 529,901.10 and 378,000.90

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Solution

The fourth proportional to 378,000.90, 529,901.10 and 378,000.90 is: 529,901.10

Step by Step Solution

  1. Step 1: Write the proportion equation
    378,000.90 : 529,901.10 = 378,000.90 : x
  2. Step 2: Convert to fraction form
    378,000.90/529,901.10 = 378,000.90/x
  3. Step 3: Cross multiply
    378,000.90x = 529,901.10 × 378,000.90
  4. Step 4: Simplify right side
    378,000.90x = 200,303,092,710.99
  5. Step 5: Solve for x
    x = 200,303,092,710.99/378,000.90
  6. Step 6: Final answer
    x = 529,901.10

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.40) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.