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Finding the Fourth Proportional to 936.14, 1,291.70 and 586.63

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Solution

The fourth proportional to 936.14, 1,291.70 and 586.63 is: 809.43

Step by Step Solution

  1. Step 1: Write the proportion equation
    936.14 : 1,291.70 = 586.63 : x
  2. Step 2: Convert to fraction form
    936.14/1,291.70 = 586.63/x
  3. Step 3: Cross multiply
    936.14x = 1,291.70 × 586.63
  4. Step 4: Simplify right side
    936.14x = 757,740.58
  5. Step 5: Solve for x
    x = 757,740.58/936.14
  6. Step 6: Final answer
    x = 809.43

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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.