Home / 5,120.54-7,680.81-1,658.06

Finding the Fourth Proportional to 5,120.54, 7,680.81 and 1,658.06

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Solution

The fourth proportional to 5,120.54, 7,680.81 and 1,658.06 is: 2,487.09

Step by Step Solution

  1. Step 1: Write the proportion equation
    5,120.54 : 7,680.81 = 1,658.06 : x
  2. Step 2: Convert to fraction form
    5,120.54/7,680.81 = 1,658.06/x
  3. Step 3: Cross multiply
    5,120.54x = 7,680.81 × 1,658.06
  4. Step 4: Simplify right side
    5,120.54x = 12,735,243.83
  5. Step 5: Solve for x
    x = 12,735,243.83/5,120.54
  6. Step 6: Final answer
    x = 2,487.09

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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.