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Finding the Fourth Proportional to 1,177.61, 1,625.19 and 680.41

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Solution

The fourth proportional to 1,177.61, 1,625.19 and 680.41 is: 939.01

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,177.61 : 1,625.19 = 680.41 : x
  2. Step 2: Convert to fraction form
    1,177.61/1,625.19 = 680.41/x
  3. Step 3: Cross multiply
    1,177.61x = 1,625.19 × 680.41
  4. Step 4: Simplify right side
    1,177.61x = 1,105,784.00
  5. Step 5: Solve for x
    x = 1,105,784.00/1,177.61
  6. Step 6: Final answer
    x = 939.01

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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.