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Finding the Fourth Proportional to 1,455.39, 2,008.87 and 866.32

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Solution

The fourth proportional to 1,455.39, 2,008.87 and 866.32 is: 1,195.77

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,455.39 : 2,008.87 = 866.32 : x
  2. Step 2: Convert to fraction form
    1,455.39/2,008.87 = 866.32/x
  3. Step 3: Cross multiply
    1,455.39x = 2,008.87 × 866.32
  4. Step 4: Simplify right side
    1,455.39x = 1,740,317.07
  5. Step 5: Solve for x
    x = 1,740,317.07/1,455.39
  6. Step 6: Final answer
    x = 1,195.77

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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.