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Finding the Fourth Proportional to 478,398.60, 660,194.66 and 263,546.28

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Solution

The fourth proportional to 478,398.60, 660,194.66 and 263,546.28 is: 363,696.40

Step by Step Solution

  1. Step 1: Write the proportion equation
    478,398.60 : 660,194.66 = 263,546.28 : x
  2. Step 2: Convert to fraction form
    478,398.60/660,194.66 = 263,546.28/x
  3. Step 3: Cross multiply
    478,398.60x = 660,194.66 × 263,546.28
  4. Step 4: Simplify right side
    478,398.60x = 173,991,846,718.87
  5. Step 5: Solve for x
    x = 173,991,846,718.87/478,398.60
  6. Step 6: Final answer
    x = 363,696.40

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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.