Home / 2,153.49-3,225.96-1,420.85

Finding the Fourth Proportional to 2,153.49, 3,225.96 and 1,420.85

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Solution

The fourth proportional to 2,153.49, 3,225.96 and 1,420.85 is: 2,128.45

Step by Step Solution

  1. Step 1: Write the proportion equation
    2,153.49 : 3,225.96 = 1,420.85 : x
  2. Step 2: Convert to fraction form
    2,153.49/3,225.96 = 1,420.85/x
  3. Step 3: Cross multiply
    2,153.49x = 3,225.96 × 1,420.85
  4. Step 4: Simplify right side
    2,153.49x = 4,583,589.14
  5. Step 5: Solve for x
    x = 4,583,589.14/2,153.49
  6. Step 6: Final answer
    x = 2,128.45

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1.5x scale

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.