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Finding the Fourth Proportional to 669.71, 922.74 and 624.54

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Solution

The fourth proportional to 669.71, 922.74 and 624.54 is: 860.51

Step by Step Solution

  1. Step 1: Write the proportion equation
    669.71 : 922.74 = 624.54 : x
  2. Step 2: Convert to fraction form
    669.71/922.74 = 624.54/x
  3. Step 3: Cross multiply
    669.71x = 922.74 × 624.54
  4. Step 4: Simplify right side
    669.71x = 576,288.04
  5. Step 5: Solve for x
    x = 576,288.04/669.71
  6. Step 6: Final answer
    x = 860.51

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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.