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Finding the Fourth Proportional to 1,179.02, 1,627.44 and 681.86

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Solution

The fourth proportional to 1,179.02, 1,627.44 and 681.86 is: 941.19

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,179.02 : 1,627.44 = 681.86 : x
  2. Step 2: Convert to fraction form
    1,179.02/1,627.44 = 681.86/x
  3. Step 3: Cross multiply
    1,179.02x = 1,627.44 × 681.86
  4. Step 4: Simplify right side
    1,179.02x = 1,109,678.10
  5. Step 5: Solve for x
    x = 1,109,678.10/1,179.02
  6. Step 6: Final answer
    x = 941.19

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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.