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Finding the Fourth Proportional to 505,806.39, 758,055.51 and 378,447.39

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Solution

The fourth proportional to 505,806.39, 758,055.51 and 378,447.39 is: 567,181.70

Step by Step Solution

  1. Step 1: Write the proportion equation
    505,806.39 : 758,055.51 = 378,447.39 : x
  2. Step 2: Convert to fraction form
    505,806.39/758,055.51 = 378,447.39/x
  3. Step 3: Cross multiply
    505,806.39x = 758,055.51 × 378,447.39
  4. Step 4: Simplify right side
    505,806.39x = 286,884,129,234.62
  5. Step 5: Solve for x
    x = 286,884,129,234.62/505,806.39
  6. Step 6: Final answer
    x = 567,181.70

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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.