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Finding the Fourth Proportional to 622.90, 858.81 and 426.10

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Solution

The fourth proportional to 622.90, 858.81 and 426.10 is: 587.48

Step by Step Solution

  1. Step 1: Write the proportion equation
    622.90 : 858.81 = 426.10 : x
  2. Step 2: Convert to fraction form
    622.90/858.81 = 426.10/x
  3. Step 3: Cross multiply
    622.90x = 858.81 × 426.10
  4. Step 4: Simplify right side
    622.90x = 365,938.94
  5. Step 5: Solve for x
    x = 365,938.94/622.90
  6. Step 6: Final answer
    x = 587.48

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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.