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Finding the Fourth Proportional to 2,812.17, 4,218.04 and 864.25

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Solution

The fourth proportional to 2,812.17, 4,218.04 and 864.25 is: 1,296.31

Step by Step Solution

  1. Step 1: Write the proportion equation
    2,812.17 : 4,218.04 = 864.25 : x
  2. Step 2: Convert to fraction form
    2,812.17/4,218.04 = 864.25/x
  3. Step 3: Cross multiply
    2,812.17x = 4,218.04 × 864.25
  4. Step 4: Simplify right side
    2,812.17x = 3,645,441.07
  5. Step 5: Solve for x
    x = 3,645,441.07/2,812.17
  6. Step 6: Final answer
    x = 1,296.31

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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.