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Finding the Fourth Proportional to 207.45, 285.78 and 152.04

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Solution

The fourth proportional to 207.45, 285.78 and 152.04 is: 209.45

Step by Step Solution

  1. Step 1: Write the proportion equation
    207.45 : 285.78 = 152.04 : x
  2. Step 2: Convert to fraction form
    207.45/285.78 = 152.04/x
  3. Step 3: Cross multiply
    207.45x = 285.78 × 152.04
  4. Step 4: Simplify right side
    207.45x = 43,449.99
  5. Step 5: Solve for x
    x = 43,449.99/207.45
  6. Step 6: Final answer
    x = 209.45

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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.