Home / 3,384.09-5,076.12-918.90

Finding the Fourth Proportional to 3,384.09, 5,076.12 and 918.90

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Solution

The fourth proportional to 3,384.09, 5,076.12 and 918.90 is: 1,378.35

Step by Step Solution

  1. Step 1: Write the proportion equation
    3,384.09 : 5,076.12 = 918.90 : x
  2. Step 2: Convert to fraction form
    3,384.09/5,076.12 = 918.90/x
  3. Step 3: Cross multiply
    3,384.09x = 5,076.12 × 918.90
  4. Step 4: Simplify right side
    3,384.09x = 4,664,446.67
  5. Step 5: Solve for x
    x = 4,664,446.67/3,384.09
  6. Step 6: Final answer
    x = 1,378.35

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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.