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Finding the Fourth Proportional to 1,329.98, 1,835.58 and 936.76

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Solution

The fourth proportional to 1,329.98, 1,835.58 and 936.76 is: 1,292.88

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,329.98 : 1,835.58 = 936.76 : x
  2. Step 2: Convert to fraction form
    1,329.98/1,835.58 = 936.76/x
  3. Step 3: Cross multiply
    1,329.98x = 1,835.58 × 936.76
  4. Step 4: Simplify right side
    1,329.98x = 1,719,497.92
  5. Step 5: Solve for x
    x = 1,719,497.92/1,329.98
  6. Step 6: Final answer
    x = 1,292.88

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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.