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Finding the Fourth Proportional to 206,693.40, 310,040.10 and 205,138.20

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Solution

The fourth proportional to 206,693.40, 310,040.10 and 205,138.20 is: 307,707.30

Step by Step Solution

  1. Step 1: Write the proportion equation
    206,693.40 : 310,040.10 = 205,138.20 : x
  2. Step 2: Convert to fraction form
    206,693.40/310,040.10 = 205,138.20/x
  3. Step 3: Cross multiply
    206,693.40x = 310,040.10 × 205,138.20
  4. Step 4: Simplify right side
    206,693.40x = 63,601,068,041.82
  5. Step 5: Solve for x
    x = 63,601,068,041.82/206,693.40
  6. Step 6: Final answer
    x = 307,707.30

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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.