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Finding the Fourth Proportional to 2,435, 3,360.36 and 1,387.28

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Solution

The fourth proportional to 2,435, 3,360.36 and 1,387.28 is: 1,914.48

Step by Step Solution

  1. Step 1: Write the proportion equation
    2,435 : 3,360.36 = 1,387.28 : x
  2. Step 2: Convert to fraction form
    2,435/3,360.36 = 1,387.28/x
  3. Step 3: Cross multiply
    2,435x = 3,360.36 × 1,387.28
  4. Step 4: Simplify right side
    2,435x = 4,661,760.22
  5. Step 5: Solve for x
    x = 4,661,760.22/2,435
  6. Step 6: Final answer
    x = 1,914.48

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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.