Home / 1,487.12-2,226.57-1,120.79

Finding the Fourth Proportional to 1,487.12, 2,226.57 and 1,120.79

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Solution

The fourth proportional to 1,487.12, 2,226.57 and 1,120.79 is: 1,678.09

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,487.12 : 2,226.57 = 1,120.79 : x
  2. Step 2: Convert to fraction form
    1,487.12/2,226.57 = 1,120.79/x
  3. Step 3: Cross multiply
    1,487.12x = 2,226.57 × 1,120.79
  4. Step 4: Simplify right side
    1,487.12x = 2,495,518.75
  5. Step 5: Solve for x
    x = 2,495,518.75/1,487.12
  6. Step 6: Final answer
    x = 1,678.09

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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.