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Finding the Fourth Proportional to 620,103.80, 930,155.70 and 609,606.20

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Solution

The fourth proportional to 620,103.80, 930,155.70 and 609,606.20 is: 914,409.30

Step by Step Solution

  1. Step 1: Write the proportion equation
    620,103.80 : 930,155.70 = 609,606.20 : x
  2. Step 2: Convert to fraction form
    620,103.80/930,155.70 = 609,606.20/x
  3. Step 3: Cross multiply
    620,103.80x = 930,155.70 × 609,606.20
  4. Step 4: Simplify right side
    620,103.80x = 567,028,681,685.34
  5. Step 5: Solve for x
    x = 567,028,681,685.34/620,103.80
  6. Step 6: Final answer
    x = 914,409.30

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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.