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Finding the Fourth Proportional to 403,421.31, 556,716.51 and 222,129.54

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Solution

The fourth proportional to 403,421.31, 556,716.51 and 222,129.54 is: 306,536.07

Step by Step Solution

  1. Step 1: Write the proportion equation
    403,421.31 : 556,716.51 = 222,129.54 : x
  2. Step 2: Convert to fraction form
    403,421.31/556,716.51 = 222,129.54/x
  3. Step 3: Cross multiply
    403,421.31x = 556,716.51 × 222,129.54
  4. Step 4: Simplify right side
    403,421.31x = 123,663,182,276.71
  5. Step 5: Solve for x
    x = 123,663,182,276.71/403,421.31
  6. Step 6: Final answer
    x = 306,536.07

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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.