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Finding the Fourth Proportional to 1,015.72, 1,522.38 and 741.40

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Solution

The fourth proportional to 1,015.72, 1,522.38 and 741.40 is: 1,111.22

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,015.72 : 1,522.38 = 741.40 : x
  2. Step 2: Convert to fraction form
    1,015.72/1,522.38 = 741.40/x
  3. Step 3: Cross multiply
    1,015.72x = 1,522.38 × 741.40
  4. Step 4: Simplify right side
    1,015.72x = 1,128,692.53
  5. Step 5: Solve for x
    x = 1,128,692.53/1,015.72
  6. Step 6: Final answer
    x = 1,111.22

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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.