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Finding the Fourth Proportional to 622.38, 858.99 and 373.74

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Solution

The fourth proportional to 622.38, 858.99 and 373.74 is: 515.82

Step by Step Solution

  1. Step 1: Write the proportion equation
    622.38 : 858.99 = 373.74 : x
  2. Step 2: Convert to fraction form
    622.38/858.99 = 373.74/x
  3. Step 3: Cross multiply
    622.38x = 858.99 × 373.74
  4. Step 4: Simplify right side
    622.38x = 321,038.92
  5. Step 5: Solve for x
    x = 321,038.92/622.38
  6. Step 6: Final answer
    x = 515.82

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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.