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Finding the Fourth Proportional to 883.87, 1,219.63 and 490.84

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Solution

The fourth proportional to 883.87, 1,219.63 and 490.84 is: 677.30

Step by Step Solution

  1. Step 1: Write the proportion equation
    883.87 : 1,219.63 = 490.84 : x
  2. Step 2: Convert to fraction form
    883.87/1,219.63 = 490.84/x
  3. Step 3: Cross multiply
    883.87x = 1,219.63 × 490.84
  4. Step 4: Simplify right side
    883.87x = 598,643.19
  5. Step 5: Solve for x
    x = 598,643.19/883.87
  6. Step 6: Final answer
    x = 677.30

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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.