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Finding the Fourth Proportional to 386,969.93, 533,989.23 and 217,171.25

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Solution

The fourth proportional to 386,969.93, 533,989.23 and 217,171.25 is: 299,679.90

Step by Step Solution

  1. Step 1: Write the proportion equation
    386,969.93 : 533,989.23 = 217,171.25 : x
  2. Step 2: Convert to fraction form
    386,969.93/533,989.23 = 217,171.25/x
  3. Step 3: Cross multiply
    386,969.93x = 533,989.23 × 217,171.25
  4. Step 4: Simplify right side
    386,969.93x = 115,967,108,565.64
  5. Step 5: Solve for x
    x = 115,967,108,565.64/386,969.93
  6. Step 6: Final answer
    x = 299,679.90

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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.