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Finding the Fourth Proportional to 883.66, 1,219.40 and 490.70

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Solution

The fourth proportional to 883.66, 1,219.40 and 490.70 is: 677.14

Step by Step Solution

  1. Step 1: Write the proportion equation
    883.66 : 1,219.40 = 490.70 : x
  2. Step 2: Convert to fraction form
    883.66/1,219.40 = 490.70/x
  3. Step 3: Cross multiply
    883.66x = 1,219.40 × 490.70
  4. Step 4: Simplify right side
    883.66x = 598,359.58
  5. Step 5: Solve for x
    x = 598,359.58/883.66
  6. Step 6: Final answer
    x = 677.14

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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.