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Finding the Fourth Proportional to 1,564.98, 2,159.75 and 866.37

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Solution

The fourth proportional to 1,564.98, 2,159.75 and 866.37 is: 1,195.63

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,564.98 : 2,159.75 = 866.37 : x
  2. Step 2: Convert to fraction form
    1,564.98/2,159.75 = 866.37/x
  3. Step 3: Cross multiply
    1,564.98x = 2,159.75 × 866.37
  4. Step 4: Simplify right side
    1,564.98x = 1,871,138.28
  5. Step 5: Solve for x
    x = 1,871,138.28/1,564.98
  6. Step 6: Final answer
    x = 1,195.63

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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.