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Finding the Fourth Proportional to 883.50, 1,219.12 and 490.47

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Solution

The fourth proportional to 883.50, 1,219.12 and 490.47 is: 676.79

Step by Step Solution

  1. Step 1: Write the proportion equation
    883.50 : 1,219.12 = 490.47 : x
  2. Step 2: Convert to fraction form
    883.50/1,219.12 = 490.47/x
  3. Step 3: Cross multiply
    883.50x = 1,219.12 × 490.47
  4. Step 4: Simplify right side
    883.50x = 597,941.79
  5. Step 5: Solve for x
    x = 597,941.79/883.50
  6. Step 6: Final answer
    x = 676.79

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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.