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Finding the Fourth Proportional to 786.19, 1,084.94 and 475.69

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Solution

The fourth proportional to 786.19, 1,084.94 and 475.69 is: 656.45

Step by Step Solution

  1. Step 1: Write the proportion equation
    786.19 : 1,084.94 = 475.69 : x
  2. Step 2: Convert to fraction form
    786.19/1,084.94 = 475.69/x
  3. Step 3: Cross multiply
    786.19x = 1,084.94 × 475.69
  4. Step 4: Simplify right side
    786.19x = 516,093.59
  5. Step 5: Solve for x
    x = 516,093.59/786.19
  6. Step 6: Final answer
    x = 656.45

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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.