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Finding the Fourth Proportional to 206,705.40, 310,058.10 and 192,708.60

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Solution

The fourth proportional to 206,705.40, 310,058.10 and 192,708.60 is: 289,062.90

Step by Step Solution

  1. Step 1: Write the proportion equation
    206,705.40 : 310,058.10 = 192,708.60 : x
  2. Step 2: Convert to fraction form
    206,705.40/310,058.10 = 192,708.60/x
  3. Step 3: Cross multiply
    206,705.40x = 310,058.10 × 192,708.60
  4. Step 4: Simplify right side
    206,705.40x = 59,750,862,369.66
  5. Step 5: Solve for x
    x = 59,750,862,369.66/206,705.40
  6. Step 6: Final answer
    x = 289,062.90

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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.