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Finding the Fourth Proportional to 2,188.84, 3,283.12 and 890.28

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Solution

The fourth proportional to 2,188.84, 3,283.12 and 890.28 is: 1,335.35

Step by Step Solution

  1. Step 1: Write the proportion equation
    2,188.84 : 3,283.12 = 890.28 : x
  2. Step 2: Convert to fraction form
    2,188.84/3,283.12 = 890.28/x
  3. Step 3: Cross multiply
    2,188.84x = 3,283.12 × 890.28
  4. Step 4: Simplify right side
    2,188.84x = 2,922,875.21
  5. Step 5: Solve for x
    x = 2,922,875.21/2,188.84
  6. Step 6: Final answer
    x = 1,335.35

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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.