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Finding the Fourth Proportional to 1,356.70, 1,872.22 and 735.70

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Solution

The fourth proportional to 1,356.70, 1,872.22 and 735.70 is: 1,015.25

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,356.70 : 1,872.22 = 735.70 : x
  2. Step 2: Convert to fraction form
    1,356.70/1,872.22 = 735.70/x
  3. Step 3: Cross multiply
    1,356.70x = 1,872.22 × 735.70
  4. Step 4: Simplify right side
    1,356.70x = 1,377,392.25
  5. Step 5: Solve for x
    x = 1,377,392.25/1,356.70
  6. Step 6: Final answer
    x = 1,015.25

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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.