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Finding the Fourth Proportional to 1,286.47, 1,932.35 and 848.35

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Solution

The fourth proportional to 1,286.47, 1,932.35 and 848.35 is: 1,274.27

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,286.47 : 1,932.35 = 848.35 : x
  2. Step 2: Convert to fraction form
    1,286.47/1,932.35 = 848.35/x
  3. Step 3: Cross multiply
    1,286.47x = 1,932.35 × 848.35
  4. Step 4: Simplify right side
    1,286.47x = 1,639,307.30
  5. Step 5: Solve for x
    x = 1,639,307.30/1,286.47
  6. Step 6: Final answer
    x = 1,274.27

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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.