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Finding the Fourth Proportional to 621.33, 930.56 and 346.81

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Solution

The fourth proportional to 621.33, 930.56 and 346.81 is: 519.41

Step by Step Solution

  1. Step 1: Write the proportion equation
    621.33 : 930.56 = 346.81 : x
  2. Step 2: Convert to fraction form
    621.33/930.56 = 346.81/x
  3. Step 3: Cross multiply
    621.33x = 930.56 × 346.81
  4. Step 4: Simplify right side
    621.33x = 322,727.51
  5. Step 5: Solve for x
    x = 322,727.51/621.33
  6. Step 6: Final answer
    x = 519.41

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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.