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Finding the Fourth Proportional to 806.36, 1,210.28 and 763.63

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Solution

The fourth proportional to 806.36, 1,210.28 and 763.63 is: 1,146.14

Step by Step Solution

  1. Step 1: Write the proportion equation
    806.36 : 1,210.28 = 763.63 : x
  2. Step 2: Convert to fraction form
    806.36/1,210.28 = 763.63/x
  3. Step 3: Cross multiply
    806.36x = 1,210.28 × 763.63
  4. Step 4: Simplify right side
    806.36x = 924,199.27
  5. Step 5: Solve for x
    x = 924,199.27/806.36
  6. Step 6: Final answer
    x = 1,146.14

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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.