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Finding the Fourth Proportional to 622.15, 858.60 and 373.48

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Solution

The fourth proportional to 622.15, 858.60 and 373.48 is: 515.42

Step by Step Solution

  1. Step 1: Write the proportion equation
    622.15 : 858.60 = 373.48 : x
  2. Step 2: Convert to fraction form
    622.15/858.60 = 373.48/x
  3. Step 3: Cross multiply
    622.15x = 858.60 × 373.48
  4. Step 4: Simplify right side
    622.15x = 320,669.93
  5. Step 5: Solve for x
    x = 320,669.93/622.15
  6. Step 6: Final answer
    x = 515.42

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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.