Home / 3,384.15-5,076.10-918.91

Finding the Fourth Proportional to 3,384.15, 5,076.10 and 918.91

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Solution

The fourth proportional to 3,384.15, 5,076.10 and 918.91 is: 1,378.33

Step by Step Solution

  1. Step 1: Write the proportion equation
    3,384.15 : 5,076.10 = 918.91 : x
  2. Step 2: Convert to fraction form
    3,384.15/5,076.10 = 918.91/x
  3. Step 3: Cross multiply
    3,384.15x = 5,076.10 × 918.91
  4. Step 4: Simplify right side
    3,384.15x = 4,664,479.05
  5. Step 5: Solve for x
    x = 4,664,479.05/3,384.15
  6. Step 6: Final answer
    x = 1,378.33

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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.