Home / 2,181.24-3,271.36-621.20

Finding the Fourth Proportional to 2,181.24, 3,271.36 and 621.20

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Solution

The fourth proportional to 2,181.24, 3,271.36 and 621.20 is: 931.66

Step by Step Solution

  1. Step 1: Write the proportion equation
    2,181.24 : 3,271.36 = 621.20 : x
  2. Step 2: Convert to fraction form
    2,181.24/3,271.36 = 621.20/x
  3. Step 3: Cross multiply
    2,181.24x = 3,271.36 × 621.20
  4. Step 4: Simplify right side
    2,181.24x = 2,032,168.83
  5. Step 5: Solve for x
    x = 2,032,168.83/2,181.24
  6. Step 6: Final answer
    x = 931.66

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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.