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Finding the Fourth Proportional to 1,101.21, 1,519.68 and 659.13

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Solution

The fourth proportional to 1,101.21, 1,519.68 and 659.13 is: 909.60

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,101.21 : 1,519.68 = 659.13 : x
  2. Step 2: Convert to fraction form
    1,101.21/1,519.68 = 659.13/x
  3. Step 3: Cross multiply
    1,101.21x = 1,519.68 × 659.13
  4. Step 4: Simplify right side
    1,101.21x = 1,001,659.08
  5. Step 5: Solve for x
    x = 1,001,659.08/1,101.21
  6. Step 6: Final answer
    x = 909.60

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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.