Home / 642,400.20-963,600.30-193,190.40

Finding the Fourth Proportional to 642,400.20, 963,600.30 and 193,190.40

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Solution

The fourth proportional to 642,400.20, 963,600.30 and 193,190.40 is: 289,785.60

Step by Step Solution

  1. Step 1: Write the proportion equation
    642,400.20 : 963,600.30 = 193,190.40 : x
  2. Step 2: Convert to fraction form
    642,400.20/963,600.30 = 193,190.40/x
  3. Step 3: Cross multiply
    642,400.20x = 963,600.30 × 193,190.40
  4. Step 4: Simplify right side
    642,400.20x = 186,158,327,397.12
  5. Step 5: Solve for x
    x = 186,158,327,397.12/642,400.20
  6. Step 6: Final answer
    x = 289,785.60

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Half scale
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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.