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Finding the Fourth Proportional to 669.75, 998.84 and 623.58

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Solution

The fourth proportional to 669.75, 998.84 and 623.58 is: 929.98

Step by Step Solution

  1. Step 1: Write the proportion equation
    669.75 : 998.84 = 623.58 : x
  2. Step 2: Convert to fraction form
    669.75/998.84 = 623.58/x
  3. Step 3: Cross multiply
    669.75x = 998.84 × 623.58
  4. Step 4: Simplify right side
    669.75x = 622,853.53
  5. Step 5: Solve for x
    x = 622,853.53/669.75
  6. Step 6: Final answer
    x = 929.98

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.49) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.