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Finding the Fourth Proportional to 368,712.80, 508,788.48 and 271,969.31

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Solution

The fourth proportional to 368,712.80, 508,788.48 and 271,969.31 is: 375,291.70

Step by Step Solution

  1. Step 1: Write the proportion equation
    368,712.80 : 508,788.48 = 271,969.31 : x
  2. Step 2: Convert to fraction form
    368,712.80/508,788.48 = 271,969.31/x
  3. Step 3: Cross multiply
    368,712.80x = 508,788.48 × 271,969.31
  4. Step 4: Simplify right side
    368,712.80x = 138,374,851,841.55
  5. Step 5: Solve for x
    x = 138,374,851,841.55/368,712.80
  6. Step 6: Final answer
    x = 375,291.70

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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.