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Finding the Fourth Proportional to 613,388.60, 918,114.60 and 479,544.20

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Solution

The fourth proportional to 613,388.60, 918,114.60 and 479,544.20 is: 717,777.49

Step by Step Solution

  1. Step 1: Write the proportion equation
    613,388.60 : 918,114.60 = 479,544.20 : x
  2. Step 2: Convert to fraction form
    613,388.60/918,114.60 = 479,544.20/x
  3. Step 3: Cross multiply
    613,388.60x = 918,114.60 × 479,544.20
  4. Step 4: Simplify right side
    613,388.60x = 440,276,531,365.32
  5. Step 5: Solve for x
    x = 440,276,531,365.32/613,388.60
  6. Step 6: Final answer
    x = 717,777.49

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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.