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Finding the Fourth Proportional to 1,956.48, 2,699.04 and 1,128

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Solution

The fourth proportional to 1,956.48, 2,699.04 and 1,128 is: 1,556.12

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,956.48 : 2,699.04 = 1,128 : x
  2. Step 2: Convert to fraction form
    1,956.48/2,699.04 = 1,128/x
  3. Step 3: Cross multiply
    1,956.48x = 2,699.04 × 1,128
  4. Step 4: Simplify right side
    1,956.48x = 3,044,517.12
  5. Step 5: Solve for x
    x = 3,044,517.12/1,956.48
  6. Step 6: Final answer
    x = 1,556.12

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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.