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Finding the Fourth Proportional to 1,225.63, 1,691.37 and 701.66

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Solution

The fourth proportional to 1,225.63, 1,691.37 and 701.66 is: 968.29

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,225.63 : 1,691.37 = 701.66 : x
  2. Step 2: Convert to fraction form
    1,225.63/1,691.37 = 701.66/x
  3. Step 3: Cross multiply
    1,225.63x = 1,691.37 × 701.66
  4. Step 4: Simplify right side
    1,225.63x = 1,186,763.17
  5. Step 5: Solve for x
    x = 1,186,763.17/1,225.63
  6. Step 6: Final answer
    x = 968.29

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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.