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Finding the Fourth Proportional to 555.02, 765.90 and 306.29

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Solution

The fourth proportional to 555.02, 765.90 and 306.29 is: 422.66

Step by Step Solution

  1. Step 1: Write the proportion equation
    555.02 : 765.90 = 306.29 : x
  2. Step 2: Convert to fraction form
    555.02/765.90 = 306.29/x
  3. Step 3: Cross multiply
    555.02x = 765.90 × 306.29
  4. Step 4: Simplify right side
    555.02x = 234,587.51
  5. Step 5: Solve for x
    x = 234,587.51/555.02
  6. Step 6: Final answer
    x = 422.66

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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.