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Finding the Fourth Proportional to 883.84, 1,219.71 and 490.90

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Solution

The fourth proportional to 883.84, 1,219.71 and 490.90 is: 677.45

Step by Step Solution

  1. Step 1: Write the proportion equation
    883.84 : 1,219.71 = 490.90 : x
  2. Step 2: Convert to fraction form
    883.84/1,219.71 = 490.90/x
  3. Step 3: Cross multiply
    883.84x = 1,219.71 × 490.90
  4. Step 4: Simplify right side
    883.84x = 598,755.64
  5. Step 5: Solve for x
    x = 598,755.64/883.84
  6. Step 6: Final answer
    x = 677.45

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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.