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Finding the Fourth Proportional to 1,374.76, 1,896.68 and 777.17

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Solution

The fourth proportional to 1,374.76, 1,896.68 and 777.17 is: 1,072.22

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,374.76 : 1,896.68 = 777.17 : x
  2. Step 2: Convert to fraction form
    1,374.76/1,896.68 = 777.17/x
  3. Step 3: Cross multiply
    1,374.76x = 1,896.68 × 777.17
  4. Step 4: Simplify right side
    1,374.76x = 1,474,042.80
  5. Step 5: Solve for x
    x = 1,474,042.80/1,374.76
  6. Step 6: Final answer
    x = 1,072.22

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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.