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Finding the Fourth Proportional to 1,172.44, 1,615.44 and 877.24

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Solution

The fourth proportional to 1,172.44, 1,615.44 and 877.24 is: 1,208.70

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,172.44 : 1,615.44 = 877.24 : x
  2. Step 2: Convert to fraction form
    1,172.44/1,615.44 = 877.24/x
  3. Step 3: Cross multiply
    1,172.44x = 1,615.44 × 877.24
  4. Step 4: Simplify right side
    1,172.44x = 1,417,128.59
  5. Step 5: Solve for x
    x = 1,417,128.59/1,172.44
  6. Step 6: Final answer
    x = 1,208.70

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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.