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Finding the Fourth Proportional to 1,329.74, 1,994.76 and 440.30

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Solution

The fourth proportional to 1,329.74, 1,994.76 and 440.30 is: 660.50

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,329.74 : 1,994.76 = 440.30 : x
  2. Step 2: Convert to fraction form
    1,329.74/1,994.76 = 440.30/x
  3. Step 3: Cross multiply
    1,329.74x = 1,994.76 × 440.30
  4. Step 4: Simplify right side
    1,329.74x = 878,283.95
  5. Step 5: Solve for x
    x = 878,283.95/1,329.74
  6. Step 6: Final answer
    x = 660.50

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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 (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.