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Finding the Fourth Proportional to 1,374.03, 1,896.21 and 784.44

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Solution

The fourth proportional to 1,374.03, 1,896.21 and 784.44 is: 1,082.55

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,374.03 : 1,896.21 = 784.44 : x
  2. Step 2: Convert to fraction form
    1,374.03/1,896.21 = 784.44/x
  3. Step 3: Cross multiply
    1,374.03x = 1,896.21 × 784.44
  4. Step 4: Simplify right side
    1,374.03x = 1,487,462.97
  5. Step 5: Solve for x
    x = 1,487,462.97/1,374.03
  6. Step 6: Final answer
    x = 1,082.55

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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.