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Finding the Fourth Proportional to 555.81, 767.04 and 319.75

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Solution

The fourth proportional to 555.81, 767.04 and 319.75 is: 441.27

Step by Step Solution

  1. Step 1: Write the proportion equation
    555.81 : 767.04 = 319.75 : x
  2. Step 2: Convert to fraction form
    555.81/767.04 = 319.75/x
  3. Step 3: Cross multiply
    555.81x = 767.04 × 319.75
  4. Step 4: Simplify right side
    555.81x = 245,261.04
  5. Step 5: Solve for x
    x = 245,261.04/555.81
  6. Step 6: Final answer
    x = 441.27

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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.