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Finding the Fourth Proportional to 1,101.16, 1,519.60 and 659

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Solution

The fourth proportional to 1,101.16, 1,519.60 and 659 is: 909.42

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,101.16 : 1,519.60 = 659 : x
  2. Step 2: Convert to fraction form
    1,101.16/1,519.60 = 659/x
  3. Step 3: Cross multiply
    1,101.16x = 1,519.60 × 659
  4. Step 4: Simplify right side
    1,101.16x = 1,001,416.40
  5. Step 5: Solve for x
    x = 1,001,416.40/1,101.16
  6. Step 6: Final answer
    x = 909.42

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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.