Home / 5,151.50-7,723.76-1,640.45

Finding the Fourth Proportional to 5,151.50, 7,723.76 and 1,640.45

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Solution

The fourth proportional to 5,151.50, 7,723.76 and 1,640.45 is: 2,459.57

Step by Step Solution

  1. Step 1: Write the proportion equation
    5,151.50 : 7,723.76 = 1,640.45 : x
  2. Step 2: Convert to fraction form
    5,151.50/7,723.76 = 1,640.45/x
  3. Step 3: Cross multiply
    5,151.50x = 7,723.76 × 1,640.45
  4. Step 4: Simplify right side
    5,151.50x = 12,670,453.20
  5. Step 5: Solve for x
    x = 12,670,453.20/5,151.50
  6. Step 6: Final answer
    x = 2,459.57

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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.