Home / 1,415.32-2,121.12-1,269.52

Finding the Fourth Proportional to 1,415.32, 2,121.12 and 1,269.52

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Solution

The fourth proportional to 1,415.32, 2,121.12 and 1,269.52 is: 1,902.61

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,415.32 : 2,121.12 = 1,269.52 : x
  2. Step 2: Convert to fraction form
    1,415.32/2,121.12 = 1,269.52/x
  3. Step 3: Cross multiply
    1,415.32x = 2,121.12 × 1,269.52
  4. Step 4: Simplify right side
    1,415.32x = 2,692,804.26
  5. Step 5: Solve for x
    x = 2,692,804.26/1,415.32
  6. Step 6: Final answer
    x = 1,902.61

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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.