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Finding the Fourth Proportional to 1,238.76, 1,857.66 and 589.80

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Solution

The fourth proportional to 1,238.76, 1,857.66 and 589.80 is: 884.47

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,238.76 : 1,857.66 = 589.80 : x
  2. Step 2: Convert to fraction form
    1,238.76/1,857.66 = 589.80/x
  3. Step 3: Cross multiply
    1,238.76x = 1,857.66 × 589.80
  4. Step 4: Simplify right side
    1,238.76x = 1,095,647.87
  5. Step 5: Solve for x
    x = 1,095,647.87/1,238.76
  6. Step 6: Final answer
    x = 884.47

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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.