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Finding the Fourth Proportional to 1,330.89, 1,996.27 and 509.10

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Solution

The fourth proportional to 1,330.89, 1,996.27 and 509.10 is: 763.63

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,330.89 : 1,996.27 = 509.10 : x
  2. Step 2: Convert to fraction form
    1,330.89/1,996.27 = 509.10/x
  3. Step 3: Cross multiply
    1,330.89x = 1,996.27 × 509.10
  4. Step 4: Simplify right side
    1,330.89x = 1,016,310.13
  5. Step 5: Solve for x
    x = 1,016,310.13/1,330.89
  6. Step 6: Final answer
    x = 763.63

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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.