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Finding the Fourth Proportional to 622.96, 858.57 and 456.91

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Solution

The fourth proportional to 622.96, 858.57 and 456.91 is: 629.72

Step by Step Solution

  1. Step 1: Write the proportion equation
    622.96 : 858.57 = 456.91 : x
  2. Step 2: Convert to fraction form
    622.96/858.57 = 456.91/x
  3. Step 3: Cross multiply
    622.96x = 858.57 × 456.91
  4. Step 4: Simplify right side
    622.96x = 392,289.22
  5. Step 5: Solve for x
    x = 392,289.22/622.96
  6. Step 6: Final answer
    x = 629.72

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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.