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Finding the Fourth Proportional to 866.49, 1,301.18 and 859.77

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Solution

The fourth proportional to 866.49, 1,301.18 and 859.77 is: 1,291.09

Step by Step Solution

  1. Step 1: Write the proportion equation
    866.49 : 1,301.18 = 859.77 : x
  2. Step 2: Convert to fraction form
    866.49/1,301.18 = 859.77/x
  3. Step 3: Cross multiply
    866.49x = 1,301.18 × 859.77
  4. Step 4: Simplify right side
    866.49x = 1,118,715.53
  5. Step 5: Solve for x
    x = 1,118,715.53/866.49
  6. Step 6: Final answer
    x = 1,291.09

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Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.