Home / 2,130.18-3,195.27-669.45

Finding the Fourth Proportional to 2,130.18, 3,195.27 and 669.45

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Solution

The fourth proportional to 2,130.18, 3,195.27 and 669.45 is: 1,004.18

Step by Step Solution

  1. Step 1: Write the proportion equation
    2,130.18 : 3,195.27 = 669.45 : x
  2. Step 2: Convert to fraction form
    2,130.18/3,195.27 = 669.45/x
  3. Step 3: Cross multiply
    2,130.18x = 3,195.27 × 669.45
  4. Step 4: Simplify right side
    2,130.18x = 2,139,073.50
  5. Step 5: Solve for x
    x = 2,139,073.50/2,130.18
  6. Step 6: Final answer
    x = 1,004.18

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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.