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Finding the Fourth Proportional to 883.54, 1,220.47 and 719.82

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Solution

The fourth proportional to 883.54, 1,220.47 and 719.82 is: 994.31

Step by Step Solution

  1. Step 1: Write the proportion equation
    883.54 : 1,220.47 = 719.82 : x
  2. Step 2: Convert to fraction form
    883.54/1,220.47 = 719.82/x
  3. Step 3: Cross multiply
    883.54x = 1,220.47 × 719.82
  4. Step 4: Simplify right side
    883.54x = 878,516.92
  5. Step 5: Solve for x
    x = 878,516.92/883.54
  6. Step 6: Final answer
    x = 994.31

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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.