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Finding the Fourth Proportional to 555.89, 767.09 and 319.66

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Solution

The fourth proportional to 555.89, 767.09 and 319.66 is: 441.11

Step by Step Solution

  1. Step 1: Write the proportion equation
    555.89 : 767.09 = 319.66 : x
  2. Step 2: Convert to fraction form
    555.89/767.09 = 319.66/x
  3. Step 3: Cross multiply
    555.89x = 767.09 × 319.66
  4. Step 4: Simplify right side
    555.89x = 245,206.87
  5. Step 5: Solve for x
    x = 245,206.87/555.89
  6. Step 6: Final answer
    x = 441.11

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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.