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Finding the Fourth Proportional to 2,104.64, 3,151.44 and 1,485

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Solution

The fourth proportional to 2,104.64, 3,151.44 and 1,485 is: 2,223.61

Step by Step Solution

  1. Step 1: Write the proportion equation
    2,104.64 : 3,151.44 = 1,485 : x
  2. Step 2: Convert to fraction form
    2,104.64/3,151.44 = 1,485/x
  3. Step 3: Cross multiply
    2,104.64x = 3,151.44 × 1,485
  4. Step 4: Simplify right side
    2,104.64x = 4,679,888.40
  5. Step 5: Solve for x
    x = 4,679,888.40/2,104.64
  6. Step 6: Final answer
    x = 2,223.61

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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.