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Finding the Fourth Proportional to 613,460.40, 920,190.60 and 347,739.90

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Solution

The fourth proportional to 613,460.40, 920,190.60 and 347,739.90 is: 521,609.85

Step by Step Solution

  1. Step 1: Write the proportion equation
    613,460.40 : 920,190.60 = 347,739.90 : x
  2. Step 2: Convert to fraction form
    613,460.40/920,190.60 = 347,739.90/x
  3. Step 3: Cross multiply
    613,460.40x = 920,190.60 × 347,739.90
  4. Step 4: Simplify right side
    613,460.40x = 319,986,987,224.94
  5. Step 5: Solve for x
    x = 319,986,987,224.94/613,460.40
  6. Step 6: Final answer
    x = 521,609.85

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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.