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Finding the Fourth Proportional to 403,086.95, 556,243.31 and 219,326.28

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Solution

The fourth proportional to 403,086.95, 556,243.31 and 219,326.28 is: 302,661.18

Step by Step Solution

  1. Step 1: Write the proportion equation
    403,086.95 : 556,243.31 = 219,326.28 : x
  2. Step 2: Convert to fraction form
    403,086.95/556,243.31 = 219,326.28/x
  3. Step 3: Cross multiply
    403,086.95x = 556,243.31 × 219,326.28
  4. Step 4: Simplify right side
    403,086.95x = 121,998,773,175.97
  5. Step 5: Solve for x
    x = 121,998,773,175.97/403,086.95
  6. Step 6: Final answer
    x = 302,661.18

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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.