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Finding the Fourth Proportional to 613,428.60, 920,142.90 and 192,703.80

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Solution

The fourth proportional to 613,428.60, 920,142.90 and 192,703.80 is: 289,055.70

Step by Step Solution

  1. Step 1: Write the proportion equation
    613,428.60 : 920,142.90 = 192,703.80 : x
  2. Step 2: Convert to fraction form
    613,428.60/920,142.90 = 192,703.80/x
  3. Step 3: Cross multiply
    613,428.60x = 920,142.90 × 192,703.80
  4. Step 4: Simplify right side
    613,428.60x = 177,315,033,373.02
  5. Step 5: Solve for x
    x = 177,315,033,373.02/613,428.60
  6. Step 6: Final answer
    x = 289,055.70

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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.