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Finding the Fourth Proportional to 1,295.21, 1,943.39 and 739.90

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Solution

The fourth proportional to 1,295.21, 1,943.39 and 739.90 is: 1,110.18

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,295.21 : 1,943.39 = 739.90 : x
  2. Step 2: Convert to fraction form
    1,295.21/1,943.39 = 739.90/x
  3. Step 3: Cross multiply
    1,295.21x = 1,943.39 × 739.90
  4. Step 4: Simplify right side
    1,295.21x = 1,437,914.26
  5. Step 5: Solve for x
    x = 1,437,914.26/1,295.21
  6. Step 6: Final answer
    x = 1,110.18

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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.