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Finding the Fourth Proportional to 1,101.70, 1,646.09 and 1,063.42

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Solution

The fourth proportional to 1,101.70, 1,646.09 and 1,063.42 is: 1,588.89

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,101.70 : 1,646.09 = 1,063.42 : x
  2. Step 2: Convert to fraction form
    1,101.70/1,646.09 = 1,063.42/x
  3. Step 3: Cross multiply
    1,101.70x = 1,646.09 × 1,063.42
  4. Step 4: Simplify right side
    1,101.70x = 1,750,485.03
  5. Step 5: Solve for x
    x = 1,750,485.03/1,101.70
  6. Step 6: Final answer
    x = 1,588.89

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Why These Related Problems?

These problems maintain the same ratio (1.49) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.