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Finding the Fourth Proportional to 219.30, 302.66 and 157.19

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Solution

The fourth proportional to 219.30, 302.66 and 157.19 is: 216.93

Step by Step Solution

  1. Step 1: Write the proportion equation
    219.30 : 302.66 = 157.19 : x
  2. Step 2: Convert to fraction form
    219.30/302.66 = 157.19/x
  3. Step 3: Cross multiply
    219.30x = 302.66 × 157.19
  4. Step 4: Simplify right side
    219.30x = 47,572.83
  5. Step 5: Solve for x
    x = 47,572.83/219.30
  6. Step 6: Final answer
    x = 216.93

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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.