Home / 2,151.06-3,226.65-690.30

Finding the Fourth Proportional to 2,151.06, 3,226.65 and 690.30

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Solution

The fourth proportional to 2,151.06, 3,226.65 and 690.30 is: 1,035.47

Step by Step Solution

  1. Step 1: Write the proportion equation
    2,151.06 : 3,226.65 = 690.30 : x
  2. Step 2: Convert to fraction form
    2,151.06/3,226.65 = 690.30/x
  3. Step 3: Cross multiply
    2,151.06x = 3,226.65 × 690.30
  4. Step 4: Simplify right side
    2,151.06x = 2,227,356.50
  5. Step 5: Solve for x
    x = 2,227,356.50/2,151.06
  6. Step 6: Final answer
    x = 1,035.47

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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.