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Finding the Fourth Proportional to 1,238.94, 1,858.68 and 588.78

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Solution

The fourth proportional to 1,238.94, 1,858.68 and 588.78 is: 883.30

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,238.94 : 1,858.68 = 588.78 : x
  2. Step 2: Convert to fraction form
    1,238.94/1,858.68 = 588.78/x
  3. Step 3: Cross multiply
    1,238.94x = 1,858.68 × 588.78
  4. Step 4: Simplify right side
    1,238.94x = 1,094,353.61
  5. Step 5: Solve for x
    x = 1,094,353.61/1,238.94
  6. Step 6: Final answer
    x = 883.30

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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.