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Finding the Fourth Proportional to 219.07, 328.51 and 127.77

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Solution

The fourth proportional to 219.07, 328.51 and 127.77 is: 191.60

Step by Step Solution

  1. Step 1: Write the proportion equation
    219.07 : 328.51 = 127.77 : x
  2. Step 2: Convert to fraction form
    219.07/328.51 = 127.77/x
  3. Step 3: Cross multiply
    219.07x = 328.51 × 127.77
  4. Step 4: Simplify right side
    219.07x = 41,973.72
  5. Step 5: Solve for x
    x = 41,973.72/219.07
  6. Step 6: Final answer
    x = 191.60

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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.