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Finding the Fourth Proportional to 511.51, 767.17 and 218.93

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Solution

The fourth proportional to 511.51, 767.17 and 218.93 is: 328.35

Step by Step Solution

  1. Step 1: Write the proportion equation
    511.51 : 767.17 = 218.93 : x
  2. Step 2: Convert to fraction form
    511.51/767.17 = 218.93/x
  3. Step 3: Cross multiply
    511.51x = 767.17 × 218.93
  4. Step 4: Simplify right side
    511.51x = 167,956.53
  5. Step 5: Solve for x
    x = 167,956.53/511.51
  6. Step 6: Final answer
    x = 328.35

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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.