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Finding the Fourth Proportional to 883.58, 1,219.40 and 490.61

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Solution

The fourth proportional to 883.58, 1,219.40 and 490.61 is: 677.07

Step by Step Solution

  1. Step 1: Write the proportion equation
    883.58 : 1,219.40 = 490.61 : x
  2. Step 2: Convert to fraction form
    883.58/1,219.40 = 490.61/x
  3. Step 3: Cross multiply
    883.58x = 1,219.40 × 490.61
  4. Step 4: Simplify right side
    883.58x = 598,246.79
  5. Step 5: Solve for x
    x = 598,246.79/883.58
  6. Step 6: Final answer
    x = 677.07

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Half scale
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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.