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Finding the Fourth Proportional to 207.32, 285.84 and 156.76

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Solution

The fourth proportional to 207.32, 285.84 and 156.76 is: 216.13

Step by Step Solution

  1. Step 1: Write the proportion equation
    207.32 : 285.84 = 156.76 : x
  2. Step 2: Convert to fraction form
    207.32/285.84 = 156.76/x
  3. Step 3: Cross multiply
    207.32x = 285.84 × 156.76
  4. Step 4: Simplify right side
    207.32x = 44,808.28
  5. Step 5: Solve for x
    x = 44,808.28/207.32
  6. Step 6: Final answer
    x = 216.13

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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.