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Finding the Fourth Proportional to 620.71, 930.01 and 446.55

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Solution

The fourth proportional to 620.71, 930.01 and 446.55 is: 669.06

Step by Step Solution

  1. Step 1: Write the proportion equation
    620.71 : 930.01 = 446.55 : x
  2. Step 2: Convert to fraction form
    620.71/930.01 = 446.55/x
  3. Step 3: Cross multiply
    620.71x = 930.01 × 446.55
  4. Step 4: Simplify right side
    620.71x = 415,294.87
  5. Step 5: Solve for x
    x = 415,294.87/620.71
  6. Step 6: Final answer
    x = 669.06

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Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.