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Finding the Fourth Proportional to 1,203.78, 1,661.22 and 706.44

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Solution

The fourth proportional to 1,203.78, 1,661.22 and 706.44 is: 974.89

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,203.78 : 1,661.22 = 706.44 : x
  2. Step 2: Convert to fraction form
    1,203.78/1,661.22 = 706.44/x
  3. Step 3: Cross multiply
    1,203.78x = 1,661.22 × 706.44
  4. Step 4: Simplify right side
    1,203.78x = 1,173,552.26
  5. Step 5: Solve for x
    x = 1,173,552.26/1,203.78
  6. Step 6: Final answer
    x = 974.89

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1.5x scale

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.