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Finding the Fourth Proportional to 1,439.48, 1,986.96 and 942.44

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Solution

The fourth proportional to 1,439.48, 1,986.96 and 942.44 is: 1,300.88

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,439.48 : 1,986.96 = 942.44 : x
  2. Step 2: Convert to fraction form
    1,439.48/1,986.96 = 942.44/x
  3. Step 3: Cross multiply
    1,439.48x = 1,986.96 × 942.44
  4. Step 4: Simplify right side
    1,439.48x = 1,872,590.58
  5. Step 5: Solve for x
    x = 1,872,590.58/1,439.48
  6. Step 6: Final answer
    x = 1,300.88

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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.