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Finding the Fourth Proportional to 1,306, 1,954.12 and 816.76

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Solution

The fourth proportional to 1,306, 1,954.12 and 816.76 is: 1,222.09

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,306 : 1,954.12 = 816.76 : x
  2. Step 2: Convert to fraction form
    1,306/1,954.12 = 816.76/x
  3. Step 3: Cross multiply
    1,306x = 1,954.12 × 816.76
  4. Step 4: Simplify right side
    1,306x = 1,596,047.05
  5. Step 5: Solve for x
    x = 1,596,047.05/1,306
  6. Step 6: Final answer
    x = 1,222.09

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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.