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Finding the Fourth Proportional to 1,330.69, 1,836.32 and 741.28

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Solution

The fourth proportional to 1,330.69, 1,836.32 and 741.28 is: 1,022.95

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,330.69 : 1,836.32 = 741.28 : x
  2. Step 2: Convert to fraction form
    1,330.69/1,836.32 = 741.28/x
  3. Step 3: Cross multiply
    1,330.69x = 1,836.32 × 741.28
  4. Step 4: Simplify right side
    1,330.69x = 1,361,227.29
  5. Step 5: Solve for x
    x = 1,361,227.29/1,330.69
  6. Step 6: Final answer
    x = 1,022.95

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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.