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Finding the Fourth Proportional to 921.38, 1,269.27 and 700.11

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Solution

The fourth proportional to 921.38, 1,269.27 and 700.11 is: 964.46

Step by Step Solution

  1. Step 1: Write the proportion equation
    921.38 : 1,269.27 = 700.11 : x
  2. Step 2: Convert to fraction form
    921.38/1,269.27 = 700.11/x
  3. Step 3: Cross multiply
    921.38x = 1,269.27 × 700.11
  4. Step 4: Simplify right side
    921.38x = 888,628.62
  5. Step 5: Solve for x
    x = 888,628.62/921.38
  6. Step 6: Final answer
    x = 964.46

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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.