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Finding the Fourth Proportional to 220,386.51, 330,967.40 and 217,231.09

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Solution

The fourth proportional to 220,386.51, 330,967.40 and 217,231.09 is: 326,228.71

Step by Step Solution

  1. Step 1: Write the proportion equation
    220,386.51 : 330,967.40 = 217,231.09 : x
  2. Step 2: Convert to fraction form
    220,386.51/330,967.40 = 217,231.09/x
  3. Step 3: Cross multiply
    220,386.51x = 330,967.40 × 217,231.09
  4. Step 4: Simplify right side
    220,386.51x = 71,896,407,142.89
  5. Step 5: Solve for x
    x = 71,896,407,142.89/220,386.51
  6. Step 6: Final answer
    x = 326,228.71

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Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.