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Finding the Fourth Proportional to 622.27, 859.13 and 556.66

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Solution

The fourth proportional to 622.27, 859.13 and 556.66 is: 768.55

Step by Step Solution

  1. Step 1: Write the proportion equation
    622.27 : 859.13 = 556.66 : x
  2. Step 2: Convert to fraction form
    622.27/859.13 = 556.66/x
  3. Step 3: Cross multiply
    622.27x = 859.13 × 556.66
  4. Step 4: Simplify right side
    622.27x = 478,243.31
  5. Step 5: Solve for x
    x = 478,243.31/622.27
  6. Step 6: Final answer
    x = 768.55

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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.