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Finding the Fourth Proportional to 478,649.78, 660,506.81 and 263,791.38

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Solution

The fourth proportional to 478,649.78, 660,506.81 and 263,791.38 is: 364,015.63

Step by Step Solution

  1. Step 1: Write the proportion equation
    478,649.78 : 660,506.81 = 263,791.38 : x
  2. Step 2: Convert to fraction form
    478,649.78/660,506.81 = 263,791.38/x
  3. Step 3: Cross multiply
    478,649.78x = 660,506.81 × 263,791.38
  4. Step 4: Simplify right side
    478,649.78x = 174,236,004,067.24
  5. Step 5: Solve for x
    x = 174,236,004,067.24/478,649.78
  6. Step 6: Final answer
    x = 364,015.63

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.