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Finding the Fourth Proportional to 1,128, 1,692 and 444.48

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Solution

The fourth proportional to 1,128, 1,692 and 444.48 is: 666.72

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,128 : 1,692 = 444.48 : x
  2. Step 2: Convert to fraction form
    1,128/1,692 = 444.48/x
  3. Step 3: Cross multiply
    1,128x = 1,692 × 444.48
  4. Step 4: Simplify right side
    1,128x = 752,060.16
  5. Step 5: Solve for x
    x = 752,060.16/1,128
  6. Step 6: Final answer
    x = 666.72

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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.