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Finding the Fourth Proportional to 883.76, 1,219.46 and 490.77

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Solution

The fourth proportional to 883.76, 1,219.46 and 490.77 is: 677.19

Step by Step Solution

  1. Step 1: Write the proportion equation
    883.76 : 1,219.46 = 490.77 : x
  2. Step 2: Convert to fraction form
    883.76/1,219.46 = 490.77/x
  3. Step 3: Cross multiply
    883.76x = 1,219.46 × 490.77
  4. Step 4: Simplify right side
    883.76x = 598,471.93
  5. Step 5: Solve for x
    x = 598,471.93/883.76
  6. Step 6: Final answer
    x = 677.19

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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.