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Finding the Fourth Proportional to 511.89, 767.80 and 146.64

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Solution

The fourth proportional to 511.89, 767.80 and 146.64 is: 219.94

Step by Step Solution

  1. Step 1: Write the proportion equation
    511.89 : 767.80 = 146.64 : x
  2. Step 2: Convert to fraction form
    511.89/767.80 = 146.64/x
  3. Step 3: Cross multiply
    511.89x = 767.80 × 146.64
  4. Step 4: Simplify right side
    511.89x = 112,587.19
  5. Step 5: Solve for x
    x = 112,587.19/511.89
  6. Step 6: Final answer
    x = 219.94

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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.