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Finding the Fourth Proportional to 3,230.40, 4,844.16 and 921.36

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Solution

The fourth proportional to 3,230.40, 4,844.16 and 921.36 is: 1,381.63

Step by Step Solution

  1. Step 1: Write the proportion equation
    3,230.40 : 4,844.16 = 921.36 : x
  2. Step 2: Convert to fraction form
    3,230.40/4,844.16 = 921.36/x
  3. Step 3: Cross multiply
    3,230.40x = 4,844.16 × 921.36
  4. Step 4: Simplify right side
    3,230.40x = 4,463,215.26
  5. Step 5: Solve for x
    x = 4,463,215.26/3,230.40
  6. Step 6: Final answer
    x = 1,381.63

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1.5x scale

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.