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Finding the Fourth Proportional to 719.39, 1,076.65 and 603.97

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Solution

The fourth proportional to 719.39, 1,076.65 and 603.97 is: 903.90

Step by Step Solution

  1. Step 1: Write the proportion equation
    719.39 : 1,076.65 = 603.97 : x
  2. Step 2: Convert to fraction form
    719.39/1,076.65 = 603.97/x
  3. Step 3: Cross multiply
    719.39x = 1,076.65 × 603.97
  4. Step 4: Simplify right side
    719.39x = 650,260.10
  5. Step 5: Solve for x
    x = 650,260.10/719.39
  6. Step 6: Final answer
    x = 903.90

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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.