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Finding the Fourth Proportional to 622.76, 858.87 and 374.02

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Solution

The fourth proportional to 622.76, 858.87 and 374.02 is: 515.82

Step by Step Solution

  1. Step 1: Write the proportion equation
    622.76 : 858.87 = 374.02 : x
  2. Step 2: Convert to fraction form
    622.76/858.87 = 374.02/x
  3. Step 3: Cross multiply
    622.76x = 858.87 × 374.02
  4. Step 4: Simplify right side
    622.76x = 321,232.41
  5. Step 5: Solve for x
    x = 321,232.41/622.76
  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.