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Finding the Fourth Proportional to 988.54, 1,363.26 and 739.60

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Solution

The fourth proportional to 988.54, 1,363.26 and 739.60 is: 1,019.96

Step by Step Solution

  1. Step 1: Write the proportion equation
    988.54 : 1,363.26 = 739.60 : x
  2. Step 2: Convert to fraction form
    988.54/1,363.26 = 739.60/x
  3. Step 3: Cross multiply
    988.54x = 1,363.26 × 739.60
  4. Step 4: Simplify right side
    988.54x = 1,008,267.10
  5. Step 5: Solve for x
    x = 1,008,267.10/988.54
  6. Step 6: Final answer
    x = 1,019.96

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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.