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Finding the Fourth Proportional to 1,238.42, 1,855.58 and 750.45

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Solution

The fourth proportional to 1,238.42, 1,855.58 and 750.45 is: 1,124.43

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,238.42 : 1,855.58 = 750.45 : x
  2. Step 2: Convert to fraction form
    1,238.42/1,855.58 = 750.45/x
  3. Step 3: Cross multiply
    1,238.42x = 1,855.58 × 750.45
  4. Step 4: Simplify right side
    1,238.42x = 1,392,516.26
  5. Step 5: Solve for x
    x = 1,392,516.26/1,238.42
  6. Step 6: Final answer
    x = 1,124.43

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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.