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Finding the Fourth Proportional to 1,930.16, 2,663.80 and 1,102

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Solution

The fourth proportional to 1,930.16, 2,663.80 and 1,102 is: 1,520.86

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,930.16 : 2,663.80 = 1,102 : x
  2. Step 2: Convert to fraction form
    1,930.16/2,663.80 = 1,102/x
  3. Step 3: Cross multiply
    1,930.16x = 2,663.80 × 1,102
  4. Step 4: Simplify right side
    1,930.16x = 2,935,507.60
  5. Step 5: Solve for x
    x = 2,935,507.60/1,930.16
  6. Step 6: Final answer
    x = 1,520.86

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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.