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Finding the Fourth Proportional to 1,355.81, 1,871.03 and 734.81

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Solution

The fourth proportional to 1,355.81, 1,871.03 and 734.81 is: 1,014.05

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,355.81 : 1,871.03 = 734.81 : x
  2. Step 2: Convert to fraction form
    1,355.81/1,871.03 = 734.81/x
  3. Step 3: Cross multiply
    1,355.81x = 1,871.03 × 734.81
  4. Step 4: Simplify right side
    1,355.81x = 1,374,858.07
  5. Step 5: Solve for x
    x = 1,374,858.07/1,355.81
  6. Step 6: Final answer
    x = 1,014.05

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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.