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Finding the Fourth Proportional to 1,374.84, 1,896.87 and 777.30

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Solution

The fourth proportional to 1,374.84, 1,896.87 and 777.30 is: 1,072.44

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,374.84 : 1,896.87 = 777.30 : x
  2. Step 2: Convert to fraction form
    1,374.84/1,896.87 = 777.30/x
  3. Step 3: Cross multiply
    1,374.84x = 1,896.87 × 777.30
  4. Step 4: Simplify right side
    1,374.84x = 1,474,427.57
  5. Step 5: Solve for x
    x = 1,474,427.57/1,374.84
  6. Step 6: Final answer
    x = 1,072.44

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1.5x scale

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.