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Finding the Fourth Proportional to 202.19, 302.70 and 140.36

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Solution

The fourth proportional to 202.19, 302.70 and 140.36 is: 210.13

Step by Step Solution

  1. Step 1: Write the proportion equation
    202.19 : 302.70 = 140.36 : x
  2. Step 2: Convert to fraction form
    202.19/302.70 = 140.36/x
  3. Step 3: Cross multiply
    202.19x = 302.70 × 140.36
  4. Step 4: Simplify right side
    202.19x = 42,485.98
  5. Step 5: Solve for x
    x = 42,485.98/202.19
  6. Step 6: Final answer
    x = 210.13

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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.