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Finding the Fourth Proportional to 620,534.34, 930,571.61 and 221,069.07

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Solution

The fourth proportional to 620,534.34, 930,571.61 and 221,069.07 is: 331,521.70

Step by Step Solution

  1. Step 1: Write the proportion equation
    620,534.34 : 930,571.61 = 221,069.07 : x
  2. Step 2: Convert to fraction form
    620,534.34/930,571.61 = 221,069.07/x
  3. Step 3: Cross multiply
    620,534.34x = 930,571.61 × 221,069.07
  4. Step 4: Simplify right side
    620,534.34x = 205,720,599,285.76
  5. Step 5: Solve for x
    x = 205,720,599,285.76/620,534.34
  6. Step 6: Final answer
    x = 331,521.70

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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.