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Finding the Fourth Proportional to 1,880.74, 2,821.11 and 906.99

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Solution

The fourth proportional to 1,880.74, 2,821.11 and 906.99 is: 1,360.49

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,880.74 : 2,821.11 = 906.99 : x
  2. Step 2: Convert to fraction form
    1,880.74/2,821.11 = 906.99/x
  3. Step 3: Cross multiply
    1,880.74x = 2,821.11 × 906.99
  4. Step 4: Simplify right side
    1,880.74x = 2,558,718.56
  5. Step 5: Solve for x
    x = 2,558,718.56/1,880.74
  6. Step 6: Final answer
    x = 1,360.49

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Half scale
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Double scale
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Similar ratio
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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.