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Finding the Fourth Proportional to 1,133.28, 1,564.02 and 636.03

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Solution

The fourth proportional to 1,133.28, 1,564.02 and 636.03 is: 877.77

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,133.28 : 1,564.02 = 636.03 : x
  2. Step 2: Convert to fraction form
    1,133.28/1,564.02 = 636.03/x
  3. Step 3: Cross multiply
    1,133.28x = 1,564.02 × 636.03
  4. Step 4: Simplify right side
    1,133.28x = 994,763.64
  5. Step 5: Solve for x
    x = 994,763.64/1,133.28
  6. Step 6: Final answer
    x = 877.77

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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.