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Finding the Fourth Proportional to 621.96, 858.34 and 373.26

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Solution

The fourth proportional to 621.96, 858.34 and 373.26 is: 515.12

Step by Step Solution

  1. Step 1: Write the proportion equation
    621.96 : 858.34 = 373.26 : x
  2. Step 2: Convert to fraction form
    621.96/858.34 = 373.26/x
  3. Step 3: Cross multiply
    621.96x = 858.34 × 373.26
  4. Step 4: Simplify right side
    621.96x = 320,383.99
  5. Step 5: Solve for x
    x = 320,383.99/621.96
  6. Step 6: Final answer
    x = 515.12

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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.