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Finding the Fourth Proportional to 622.91, 859.74 and 475.28

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Solution

The fourth proportional to 622.91, 859.74 and 475.28 is: 655.98

Step by Step Solution

  1. Step 1: Write the proportion equation
    622.91 : 859.74 = 475.28 : x
  2. Step 2: Convert to fraction form
    622.91/859.74 = 475.28/x
  3. Step 3: Cross multiply
    622.91x = 859.74 × 475.28
  4. Step 4: Simplify right side
    622.91x = 408,617.23
  5. Step 5: Solve for x
    x = 408,617.23/622.91
  6. Step 6: Final answer
    x = 655.98

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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.