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Finding the Fourth Proportional to 792,679.80, 1,189,019.70 and 509,244.60

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Solution

The fourth proportional to 792,679.80, 1,189,019.70 and 509,244.60 is: 763,866.90

Step by Step Solution

  1. Step 1: Write the proportion equation
    792,679.80 : 1,189,019.70 = 509,244.60 : x
  2. Step 2: Convert to fraction form
    792,679.80/1,189,019.70 = 509,244.60/x
  3. Step 3: Cross multiply
    792,679.80x = 1,189,019.70 × 509,244.60
  4. Step 4: Simplify right side
    792,679.80x = 605,501,861,518.62
  5. Step 5: Solve for x
    x = 605,501,861,518.62/792,679.80
  6. Step 6: Final answer
    x = 763,866.90

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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.