Home / 2,148.16-3,220.06-686.24

Finding the Fourth Proportional to 2,148.16, 3,220.06 and 686.24

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Solution

The fourth proportional to 2,148.16, 3,220.06 and 686.24 is: 1,028.66

Step by Step Solution

  1. Step 1: Write the proportion equation
    2,148.16 : 3,220.06 = 686.24 : x
  2. Step 2: Convert to fraction form
    2,148.16/3,220.06 = 686.24/x
  3. Step 3: Cross multiply
    2,148.16x = 3,220.06 × 686.24
  4. Step 4: Simplify right side
    2,148.16x = 2,209,733.97
  5. Step 5: Solve for x
    x = 2,209,733.97/2,148.16
  6. Step 6: Final answer
    x = 1,028.66

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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.