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Finding the Fourth Proportional to 613,420.60, 920,130.90 and 192,695.80

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Solution

The fourth proportional to 613,420.60, 920,130.90 and 192,695.80 is: 289,043.70

Step by Step Solution

  1. Step 1: Write the proportion equation
    613,420.60 : 920,130.90 = 192,695.80 : x
  2. Step 2: Convert to fraction form
    613,420.60/920,130.90 = 192,695.80/x
  3. Step 3: Cross multiply
    613,420.60x = 920,130.90 × 192,695.80
  4. Step 4: Simplify right side
    613,420.60x = 177,305,359,880.22
  5. Step 5: Solve for x
    x = 177,305,359,880.22/613,420.60
  6. Step 6: Final answer
    x = 289,043.70

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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.