Home / 1,439.92-2,161-1,153.20

Finding the Fourth Proportional to 1,439.92, 2,161 and 1,153.20

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Solution

The fourth proportional to 1,439.92, 2,161 and 1,153.20 is: 1,730.70

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,439.92 : 2,161 = 1,153.20 : x
  2. Step 2: Convert to fraction form
    1,439.92/2,161 = 1,153.20/x
  3. Step 3: Cross multiply
    1,439.92x = 2,161 × 1,153.20
  4. Step 4: Simplify right side
    1,439.92x = 2,492,065.20
  5. Step 5: Solve for x
    x = 2,492,065.20/1,439.92
  6. Step 6: Final answer
    x = 1,730.70

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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.