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Finding the Fourth Proportional to 1,377.65, 2,066.48 and 511.79

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Solution

The fourth proportional to 1,377.65, 2,066.48 and 511.79 is: 767.69

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,377.65 : 2,066.48 = 511.79 : x
  2. Step 2: Convert to fraction form
    1,377.65/2,066.48 = 511.79/x
  3. Step 3: Cross multiply
    1,377.65x = 2,066.48 × 511.79
  4. Step 4: Simplify right side
    1,377.65x = 1,057,601.24
  5. Step 5: Solve for x
    x = 1,057,601.24/1,377.65
  6. Step 6: Final answer
    x = 767.69

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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.