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Finding the Fourth Proportional to 927.96, 1,390.92 and 441.12

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Solution

The fourth proportional to 927.96, 1,390.92 and 441.12 is: 661.20

Step by Step Solution

  1. Step 1: Write the proportion equation
    927.96 : 1,390.92 = 441.12 : x
  2. Step 2: Convert to fraction form
    927.96/1,390.92 = 441.12/x
  3. Step 3: Cross multiply
    927.96x = 1,390.92 × 441.12
  4. Step 4: Simplify right side
    927.96x = 613,562.63
  5. Step 5: Solve for x
    x = 613,562.63/927.96
  6. Step 6: Final answer
    x = 661.20

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.