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Finding the Fourth Proportional to 555.26, 766.28 and 306.58

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Solution

The fourth proportional to 555.26, 766.28 and 306.58 is: 423.09

Step by Step Solution

  1. Step 1: Write the proportion equation
    555.26 : 766.28 = 306.58 : x
  2. Step 2: Convert to fraction form
    555.26/766.28 = 306.58/x
  3. Step 3: Cross multiply
    555.26x = 766.28 × 306.58
  4. Step 4: Simplify right side
    555.26x = 234,926.12
  5. Step 5: Solve for x
    x = 234,926.12/555.26
  6. Step 6: Final answer
    x = 423.09

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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.