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Finding the Fourth Proportional to 1,210.63, 1,816.21 and 441.13

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Solution

The fourth proportional to 1,210.63, 1,816.21 and 441.13 is: 661.79

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,210.63 : 1,816.21 = 441.13 : x
  2. Step 2: Convert to fraction form
    1,210.63/1,816.21 = 441.13/x
  3. Step 3: Cross multiply
    1,210.63x = 1,816.21 × 441.13
  4. Step 4: Simplify right side
    1,210.63x = 801,174.53
  5. Step 5: Solve for x
    x = 801,174.53/1,210.63
  6. Step 6: Final answer
    x = 661.79

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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.