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Finding the Fourth Proportional to 207.09, 310.68 and 70.18

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Solution

The fourth proportional to 207.09, 310.68 and 70.18 is: 105.28

Step by Step Solution

  1. Step 1: Write the proportion equation
    207.09 : 310.68 = 70.18 : x
  2. Step 2: Convert to fraction form
    207.09/310.68 = 70.18/x
  3. Step 3: Cross multiply
    207.09x = 310.68 × 70.18
  4. Step 4: Simplify right side
    207.09x = 21,802.75
  5. Step 5: Solve for x
    x = 21,802.75/207.09
  6. Step 6: Final answer
    x = 105.28

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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.