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Finding the Fourth Proportional to 622.19, 858.61 and 373.39

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Solution

The fourth proportional to 622.19, 858.61 and 373.39 is: 515.27

Step by Step Solution

  1. Step 1: Write the proportion equation
    622.19 : 858.61 = 373.39 : x
  2. Step 2: Convert to fraction form
    622.19/858.61 = 373.39/x
  3. Step 3: Cross multiply
    622.19x = 858.61 × 373.39
  4. Step 4: Simplify right side
    622.19x = 320,596.39
  5. Step 5: Solve for x
    x = 320,596.39/622.19
  6. Step 6: Final answer
    x = 515.27

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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.