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Finding the Fourth Proportional to 1,355.94, 1,871.21 and 734.94

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Solution

The fourth proportional to 1,355.94, 1,871.21 and 734.94 is: 1,014.22

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,355.94 : 1,871.21 = 734.94 : x
  2. Step 2: Convert to fraction form
    1,355.94/1,871.21 = 734.94/x
  3. Step 3: Cross multiply
    1,355.94x = 1,871.21 × 734.94
  4. Step 4: Simplify right side
    1,355.94x = 1,375,227.08
  5. Step 5: Solve for x
    x = 1,375,227.08/1,355.94
  6. Step 6: Final answer
    x = 1,014.22

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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.