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Finding the Fourth Proportional to 669.51, 923.90 and 374.78

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Solution

The fourth proportional to 669.51, 923.90 and 374.78 is: 517.18

Step by Step Solution

  1. Step 1: Write the proportion equation
    669.51 : 923.90 = 374.78 : x
  2. Step 2: Convert to fraction form
    669.51/923.90 = 374.78/x
  3. Step 3: Cross multiply
    669.51x = 923.90 × 374.78
  4. Step 4: Simplify right side
    669.51x = 346,259.68
  5. Step 5: Solve for x
    x = 346,259.68/669.51
  6. Step 6: Final answer
    x = 517.18

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These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.