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Finding the Fourth Proportional to 621.84, 933.05 and 539.66

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Solution

The fourth proportional to 621.84, 933.05 and 539.66 is: 809.74

Step by Step Solution

  1. Step 1: Write the proportion equation
    621.84 : 933.05 = 539.66 : x
  2. Step 2: Convert to fraction form
    621.84/933.05 = 539.66/x
  3. Step 3: Cross multiply
    621.84x = 933.05 × 539.66
  4. Step 4: Simplify right side
    621.84x = 503,533.44
  5. Step 5: Solve for x
    x = 503,533.44/621.84
  6. Step 6: Final answer
    x = 809.74

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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.