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Finding the Fourth Proportional to 622.21, 858.78 and 373.58

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Solution

The fourth proportional to 622.21, 858.78 and 373.58 is: 515.62

Step by Step Solution

  1. Step 1: Write the proportion equation
    622.21 : 858.78 = 373.58 : x
  2. Step 2: Convert to fraction form
    622.21/858.78 = 373.58/x
  3. Step 3: Cross multiply
    622.21x = 858.78 × 373.58
  4. Step 4: Simplify right side
    622.21x = 320,823.03
  5. Step 5: Solve for x
    x = 320,823.03/622.21
  6. Step 6: Final answer
    x = 515.62

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1.5x scale

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.