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Finding the Fourth Proportional to 719.58, 1,076.94 and 611.04

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Solution

The fourth proportional to 719.58, 1,076.94 and 611.04 is: 914.50

Step by Step Solution

  1. Step 1: Write the proportion equation
    719.58 : 1,076.94 = 611.04 : x
  2. Step 2: Convert to fraction form
    719.58/1,076.94 = 611.04/x
  3. Step 3: Cross multiply
    719.58x = 1,076.94 × 611.04
  4. Step 4: Simplify right side
    719.58x = 658,053.42
  5. Step 5: Solve for x
    x = 658,053.42/719.58
  6. Step 6: Final answer
    x = 914.50

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Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.