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Finding the Fourth Proportional to 202.21, 302.88 and 124.90

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Solution

The fourth proportional to 202.21, 302.88 and 124.90 is: 187.08

Step by Step Solution

  1. Step 1: Write the proportion equation
    202.21 : 302.88 = 124.90 : x
  2. Step 2: Convert to fraction form
    202.21/302.88 = 124.90/x
  3. Step 3: Cross multiply
    202.21x = 302.88 × 124.90
  4. Step 4: Simplify right side
    202.21x = 37,829.71
  5. Step 5: Solve for x
    x = 37,829.71/202.21
  6. Step 6: Final answer
    x = 187.08

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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.