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Finding the Fourth Proportional to 478,539.78, 660,414.39 and 263,679.81

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Solution

The fourth proportional to 478,539.78, 660,414.39 and 263,679.81 is: 363,894.39

Step by Step Solution

  1. Step 1: Write the proportion equation
    478,539.78 : 660,414.39 = 263,679.81 : x
  2. Step 2: Convert to fraction form
    478,539.78/660,414.39 = 263,679.81/x
  3. Step 3: Cross multiply
    478,539.78x = 660,414.39 × 263,679.81
  4. Step 4: Simplify right side
    478,539.78x = 174,137,940,876.47
  5. Step 5: Solve for x
    x = 174,137,940,876.47/478,539.78
  6. Step 6: Final answer
    x = 363,894.39

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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.