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Finding the Fourth Proportional to 351,499, 485,067.90 and 190,354

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Solution

The fourth proportional to 351,499, 485,067.90 and 190,354 is: 262,688.13

Step by Step Solution

  1. Step 1: Write the proportion equation
    351,499 : 485,067.90 = 190,354 : x
  2. Step 2: Convert to fraction form
    351,499/485,067.90 = 190,354/x
  3. Step 3: Cross multiply
    351,499x = 485,067.90 × 190,354
  4. Step 4: Simplify right side
    351,499x = 92,334,615,036.60
  5. Step 5: Solve for x
    x = 92,334,615,036.60/351,499
  6. Step 6: Final answer
    x = 262,688.13

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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.