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Finding the Fourth Proportional to 883.49, 1,219.24 and 490.50

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Solution

The fourth proportional to 883.49, 1,219.24 and 490.50 is: 676.91

Step by Step Solution

  1. Step 1: Write the proportion equation
    883.49 : 1,219.24 = 490.50 : x
  2. Step 2: Convert to fraction form
    883.49/1,219.24 = 490.50/x
  3. Step 3: Cross multiply
    883.49x = 1,219.24 × 490.50
  4. Step 4: Simplify right side
    883.49x = 598,037.83
  5. Step 5: Solve for x
    x = 598,037.83/883.49
  6. Step 6: Final answer
    x = 676.91

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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.