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Finding the Fourth Proportional to 669.32, 923.65 and 370.56

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Solution

The fourth proportional to 669.32, 923.65 and 370.56 is: 511.36

Step by Step Solution

  1. Step 1: Write the proportion equation
    669.32 : 923.65 = 370.56 : x
  2. Step 2: Convert to fraction form
    669.32/923.65 = 370.56/x
  3. Step 3: Cross multiply
    669.32x = 923.65 × 370.56
  4. Step 4: Simplify right side
    669.32x = 342,265.89
  5. Step 5: Solve for x
    x = 342,265.89/669.32
  6. Step 6: Final answer
    x = 511.36

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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.