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Finding the Fourth Proportional to 1,224.97, 1,690.60 and 701.10

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Solution

The fourth proportional to 1,224.97, 1,690.60 and 701.10 is: 967.60

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,224.97 : 1,690.60 = 701.10 : x
  2. Step 2: Convert to fraction form
    1,224.97/1,690.60 = 701.10/x
  3. Step 3: Cross multiply
    1,224.97x = 1,690.60 × 701.10
  4. Step 4: Simplify right side
    1,224.97x = 1,185,279.66
  5. Step 5: Solve for x
    x = 1,185,279.66/1,224.97
  6. Step 6: Final answer
    x = 967.60

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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.