Home / 3,612.34-5,418.85-1,420.56

Finding the Fourth Proportional to 3,612.34, 5,418.85 and 1,420.56

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Solution

The fourth proportional to 3,612.34, 5,418.85 and 1,420.56 is: 2,130.97

Step by Step Solution

  1. Step 1: Write the proportion equation
    3,612.34 : 5,418.85 = 1,420.56 : x
  2. Step 2: Convert to fraction form
    3,612.34/5,418.85 = 1,420.56/x
  3. Step 3: Cross multiply
    3,612.34x = 5,418.85 × 1,420.56
  4. Step 4: Simplify right side
    3,612.34x = 7,697,801.56
  5. Step 5: Solve for x
    x = 7,697,801.56/3,612.34
  6. Step 6: Final answer
    x = 2,130.97

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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.