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Finding the Fourth Proportional to 202.13, 302.51 and 156.68

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Solution

The fourth proportional to 202.13, 302.51 and 156.68 is: 234.49

Step by Step Solution

  1. Step 1: Write the proportion equation
    202.13 : 302.51 = 156.68 : x
  2. Step 2: Convert to fraction form
    202.13/302.51 = 156.68/x
  3. Step 3: Cross multiply
    202.13x = 302.51 × 156.68
  4. Step 4: Simplify right side
    202.13x = 47,397.27
  5. Step 5: Solve for x
    x = 47,397.27/202.13
  6. Step 6: Final answer
    x = 234.49

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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.