Home / 2,130.72-3,196.38-669.99

Finding the Fourth Proportional to 2,130.72, 3,196.38 and 669.99

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Solution

The fourth proportional to 2,130.72, 3,196.38 and 669.99 is: 1,005.08

Step by Step Solution

  1. Step 1: Write the proportion equation
    2,130.72 : 3,196.38 = 669.99 : x
  2. Step 2: Convert to fraction form
    2,130.72/3,196.38 = 669.99/x
  3. Step 3: Cross multiply
    2,130.72x = 3,196.38 × 669.99
  4. Step 4: Simplify right side
    2,130.72x = 2,141,542.64
  5. Step 5: Solve for x
    x = 2,141,542.64/2,130.72
  6. Step 6: Final answer
    x = 1,005.08

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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.