Home / 3,720.99-5,579.85-1,123.32

Finding the Fourth Proportional to 3,720.99, 5,579.85 and 1,123.32

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Solution

The fourth proportional to 3,720.99, 5,579.85 and 1,123.32 is: 1,684.49

Step by Step Solution

  1. Step 1: Write the proportion equation
    3,720.99 : 5,579.85 = 1,123.32 : x
  2. Step 2: Convert to fraction form
    3,720.99/5,579.85 = 1,123.32/x
  3. Step 3: Cross multiply
    3,720.99x = 5,579.85 × 1,123.32
  4. Step 4: Simplify right side
    3,720.99x = 6,267,957.10
  5. Step 5: Solve for x
    x = 6,267,957.10/3,720.99
  6. Step 6: Final answer
    x = 1,684.49

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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.