Home / 1,415.10-2,118.60-1,269.30

Finding the Fourth Proportional to 1,415.10, 2,118.60 and 1,269.30

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Solution

The fourth proportional to 1,415.10, 2,118.60 and 1,269.30 is: 1,900.32

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,415.10 : 2,118.60 = 1,269.30 : x
  2. Step 2: Convert to fraction form
    1,415.10/2,118.60 = 1,269.30/x
  3. Step 3: Cross multiply
    1,415.10x = 2,118.60 × 1,269.30
  4. Step 4: Simplify right side
    1,415.10x = 2,689,138.98
  5. Step 5: Solve for x
    x = 2,689,138.98/1,415.10
  6. Step 6: Final answer
    x = 1,900.32

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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.