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Finding the Fourth Proportional to 1,330.76, 1,996.96 and 509.10

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Solution

The fourth proportional to 1,330.76, 1,996.96 and 509.10 is: 763.96

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,330.76 : 1,996.96 = 509.10 : x
  2. Step 2: Convert to fraction form
    1,330.76/1,996.96 = 509.10/x
  3. Step 3: Cross multiply
    1,330.76x = 1,996.96 × 509.10
  4. Step 4: Simplify right side
    1,330.76x = 1,016,652.34
  5. Step 5: Solve for x
    x = 1,016,652.34/1,330.76
  6. Step 6: Final answer
    x = 763.96

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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.