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Finding the Fourth Proportional to 1,225.66, 1,691.43 and 701.68

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Solution

The fourth proportional to 1,225.66, 1,691.43 and 701.68 is: 968.33

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,225.66 : 1,691.43 = 701.68 : x
  2. Step 2: Convert to fraction form
    1,225.66/1,691.43 = 701.68/x
  3. Step 3: Cross multiply
    1,225.66x = 1,691.43 × 701.68
  4. Step 4: Simplify right side
    1,225.66x = 1,186,842.60
  5. Step 5: Solve for x
    x = 1,186,842.60/1,225.66
  6. Step 6: Final answer
    x = 968.33

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Double scale
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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.