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Finding the Fourth Proportional to 806.51, 1,210.15 and 441.28

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Solution

The fourth proportional to 806.51, 1,210.15 and 441.28 is: 662.13

Step by Step Solution

  1. Step 1: Write the proportion equation
    806.51 : 1,210.15 = 441.28 : x
  2. Step 2: Convert to fraction form
    806.51/1,210.15 = 441.28/x
  3. Step 3: Cross multiply
    806.51x = 1,210.15 × 441.28
  4. Step 4: Simplify right side
    806.51x = 534,014.99
  5. Step 5: Solve for x
    x = 534,014.99/806.51
  6. Step 6: Final answer
    x = 662.13

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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.