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Finding the Fourth Proportional to 622.16, 859.56 and 556.88

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Solution

The fourth proportional to 622.16, 859.56 and 556.88 is: 769.37

Step by Step Solution

  1. Step 1: Write the proportion equation
    622.16 : 859.56 = 556.88 : x
  2. Step 2: Convert to fraction form
    622.16/859.56 = 556.88/x
  3. Step 3: Cross multiply
    622.16x = 859.56 × 556.88
  4. Step 4: Simplify right side
    622.16x = 478,671.77
  5. Step 5: Solve for x
    x = 478,671.77/622.16
  6. Step 6: Final answer
    x = 769.37

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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.