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Finding the Fourth Proportional to 613,645.60, 920,468.40 and 192,920.80

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Solution

The fourth proportional to 613,645.60, 920,468.40 and 192,920.80 is: 289,381.20

Step by Step Solution

  1. Step 1: Write the proportion equation
    613,645.60 : 920,468.40 = 192,920.80 : x
  2. Step 2: Convert to fraction form
    613,645.60/920,468.40 = 192,920.80/x
  3. Step 3: Cross multiply
    613,645.60x = 920,468.40 × 192,920.80
  4. Step 4: Simplify right side
    613,645.60x = 177,577,500,102.72
  5. Step 5: Solve for x
    x = 177,577,500,102.72/613,645.60
  6. Step 6: Final answer
    x = 289,381.20

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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.