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Finding the Fourth Proportional to 685.05, 944.58 and 669.96

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Solution

The fourth proportional to 685.05, 944.58 and 669.96 is: 923.77

Step by Step Solution

  1. Step 1: Write the proportion equation
    685.05 : 944.58 = 669.96 : x
  2. Step 2: Convert to fraction form
    685.05/944.58 = 669.96/x
  3. Step 3: Cross multiply
    685.05x = 944.58 × 669.96
  4. Step 4: Simplify right side
    685.05x = 632,830.82
  5. Step 5: Solve for x
    x = 632,830.82/685.05
  6. Step 6: Final answer
    x = 923.77

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1.5x scale

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.