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Finding the Fourth Proportional to 219.58, 302.93 and 140.76

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Solution

The fourth proportional to 219.58, 302.93 and 140.76 is: 194.18

Step by Step Solution

  1. Step 1: Write the proportion equation
    219.58 : 302.93 = 140.76 : x
  2. Step 2: Convert to fraction form
    219.58/302.93 = 140.76/x
  3. Step 3: Cross multiply
    219.58x = 302.93 × 140.76
  4. Step 4: Simplify right side
    219.58x = 42,638.21
  5. Step 5: Solve for x
    x = 42,638.21/219.58
  6. Step 6: Final answer
    x = 194.18

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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.