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Finding the Fourth Proportional to 206,679.40, 310,019.10 and 205,124.20

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Solution

The fourth proportional to 206,679.40, 310,019.10 and 205,124.20 is: 307,686.30

Step by Step Solution

  1. Step 1: Write the proportion equation
    206,679.40 : 310,019.10 = 205,124.20 : x
  2. Step 2: Convert to fraction form
    206,679.40/310,019.10 = 205,124.20/x
  3. Step 3: Cross multiply
    206,679.40x = 310,019.10 × 205,124.20
  4. Step 4: Simplify right side
    206,679.40x = 63,592,419,872.22
  5. Step 5: Solve for x
    x = 63,592,419,872.22/206,679.40
  6. Step 6: Final answer
    x = 307,686.30

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1.5x scale

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.