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Finding the Fourth Proportional to 1,455.76, 2,008.69 and 866.49

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Solution

The fourth proportional to 1,455.76, 2,008.69 and 866.49 is: 1,195.60

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,455.76 : 2,008.69 = 866.49 : x
  2. Step 2: Convert to fraction form
    1,455.76/2,008.69 = 866.49/x
  3. Step 3: Cross multiply
    1,455.76x = 2,008.69 × 866.49
  4. Step 4: Simplify right side
    1,455.76x = 1,740,509.80
  5. Step 5: Solve for x
    x = 1,740,509.80/1,455.76
  6. Step 6: Final answer
    x = 1,195.60

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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.