Home / 3,280.11-4,920.08-814.91

Finding the Fourth Proportional to 3,280.11, 4,920.08 and 814.91

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Solution

The fourth proportional to 3,280.11, 4,920.08 and 814.91 is: 1,222.34

Step by Step Solution

  1. Step 1: Write the proportion equation
    3,280.11 : 4,920.08 = 814.91 : x
  2. Step 2: Convert to fraction form
    3,280.11/4,920.08 = 814.91/x
  3. Step 3: Cross multiply
    3,280.11x = 4,920.08 × 814.91
  4. Step 4: Simplify right side
    3,280.11x = 4,009,393.72
  5. Step 5: Solve for x
    x = 4,009,393.72/3,280.11
  6. Step 6: Final answer
    x = 1,222.34

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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.