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Finding the Fourth Proportional to 1,131.07, 1,560.74 and 633.60

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Solution

The fourth proportional to 1,131.07, 1,560.74 and 633.60 is: 874.28

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,131.07 : 1,560.74 = 633.60 : x
  2. Step 2: Convert to fraction form
    1,131.07/1,560.74 = 633.60/x
  3. Step 3: Cross multiply
    1,131.07x = 1,560.74 × 633.60
  4. Step 4: Simplify right side
    1,131.07x = 988,877.06
  5. Step 5: Solve for x
    x = 988,877.06/1,131.07
  6. Step 6: Final answer
    x = 874.28

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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.