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Finding the Fourth Proportional to 2,256.11, 3,384.16 and 612.90

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Solution

The fourth proportional to 2,256.11, 3,384.16 and 612.90 is: 919.34

Step by Step Solution

  1. Step 1: Write the proportion equation
    2,256.11 : 3,384.16 = 612.90 : x
  2. Step 2: Convert to fraction form
    2,256.11/3,384.16 = 612.90/x
  3. Step 3: Cross multiply
    2,256.11x = 3,384.16 × 612.90
  4. Step 4: Simplify right side
    2,256.11x = 2,074,134.74
  5. Step 5: Solve for x
    x = 2,074,134.74/2,256.11
  6. Step 6: Final answer
    x = 919.34

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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.