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Finding the Fourth Proportional to 621.84, 933.58 and 417.33

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Solution

The fourth proportional to 621.84, 933.58 and 417.33 is: 626.55

Step by Step Solution

  1. Step 1: Write the proportion equation
    621.84 : 933.58 = 417.33 : x
  2. Step 2: Convert to fraction form
    621.84/933.58 = 417.33/x
  3. Step 3: Cross multiply
    621.84x = 933.58 × 417.33
  4. Step 4: Simplify right side
    621.84x = 389,610.94
  5. Step 5: Solve for x
    x = 389,610.94/621.84
  6. Step 6: Final answer
    x = 626.55

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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.