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Finding the Fourth Proportional to 2,931.44, 4,396.55 and 851.00

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Solution

The fourth proportional to 2,931.44, 4,396.55 and 851.00 is: 1,276.32

Step by Step Solution

  1. Step 1: Write the proportion equation
    2,931.44 : 4,396.55 = 851.00 : x
  2. Step 2: Convert to fraction form
    2,931.44/4,396.55 = 851.00/x
  3. Step 3: Cross multiply
    2,931.44x = 4,396.55 × 851.00
  4. Step 4: Simplify right side
    2,931.44x = 3,741,437.81
  5. Step 5: Solve for x
    x = 3,741,437.81/2,931.44
  6. Step 6: Final answer
    x = 1,276.32

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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.