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Finding the Fourth Proportional to 620,712.20, 930,981.90 and 200,030.60

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Solution

The fourth proportional to 620,712.20, 930,981.90 and 200,030.60 is: 300,018.06

Step by Step Solution

  1. Step 1: Write the proportion equation
    620,712.20 : 930,981.90 = 200,030.60 : x
  2. Step 2: Convert to fraction form
    620,712.20/930,981.90 = 200,030.60/x
  3. Step 3: Cross multiply
    620,712.20x = 930,981.90 × 200,030.60
  4. Step 4: Simplify right side
    620,712.20x = 186,224,868,046.14
  5. Step 5: Solve for x
    x = 186,224,868,046.14/620,712.20
  6. Step 6: Final answer
    x = 300,018.06

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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.