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Finding the Fourth Proportional to 1,110.00, 1,530.87 and 667.81

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Solution

The fourth proportional to 1,110.00, 1,530.87 and 667.81 is: 921.01

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,110.00 : 1,530.87 = 667.81 : x
  2. Step 2: Convert to fraction form
    1,110.00/1,530.87 = 667.81/x
  3. Step 3: Cross multiply
    1,110.00x = 1,530.87 × 667.81
  4. Step 4: Simplify right side
    1,110.00x = 1,022,329.70
  5. Step 5: Solve for x
    x = 1,022,329.70/1,110.00
  6. Step 6: Final answer
    x = 921.01

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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.