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Finding the Fourth Proportional to 1,225.70, 1,691.46 and 701.73

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Solution

The fourth proportional to 1,225.70, 1,691.46 and 701.73 is: 968.39

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,225.70 : 1,691.46 = 701.73 : x
  2. Step 2: Convert to fraction form
    1,225.70/1,691.46 = 701.73/x
  3. Step 3: Cross multiply
    1,225.70x = 1,691.46 × 701.73
  4. Step 4: Simplify right side
    1,225.70x = 1,186,948.23
  5. Step 5: Solve for x
    x = 1,186,948.23/1,225.70
  6. Step 6: Final answer
    x = 968.39

Related Problems

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Half scale
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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.