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Finding the Fourth Proportional to 1,306, 1,802.11 and 716.38

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Solution

The fourth proportional to 1,306, 1,802.11 and 716.38 is: 988.51

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,306 : 1,802.11 = 716.38 : x
  2. Step 2: Convert to fraction form
    1,306/1,802.11 = 716.38/x
  3. Step 3: Cross multiply
    1,306x = 1,802.11 × 716.38
  4. Step 4: Simplify right side
    1,306x = 1,290,995.56
  5. Step 5: Solve for x
    x = 1,290,995.56/1,306
  6. Step 6: Final answer
    x = 988.51

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Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.