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Finding the Fourth Proportional to 403,010.43, 556,154.42 and 221,718.48

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Solution

The fourth proportional to 403,010.43, 556,154.42 and 221,718.48 is: 305,971.51

Step by Step Solution

  1. Step 1: Write the proportion equation
    403,010.43 : 556,154.42 = 221,718.48 : x
  2. Step 2: Convert to fraction form
    403,010.43/556,154.42 = 221,718.48/x
  3. Step 3: Cross multiply
    403,010.43x = 556,154.42 × 221,718.48
  4. Step 4: Simplify right side
    403,010.43x = 123,309,711,539.09
  5. Step 5: Solve for x
    x = 123,309,711,539.09/403,010.43
  6. Step 6: Final answer
    x = 305,971.51

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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.