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Finding the Fourth Proportional to 1,206.05, 1,809.71 and 556.70

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Solution

The fourth proportional to 1,206.05, 1,809.71 and 556.70 is: 835.34

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,206.05 : 1,809.71 = 556.70 : x
  2. Step 2: Convert to fraction form
    1,206.05/1,809.71 = 556.70/x
  3. Step 3: Cross multiply
    1,206.05x = 1,809.71 × 556.70
  4. Step 4: Simplify right side
    1,206.05x = 1,007,453.72
  5. Step 5: Solve for x
    x = 1,007,453.72/1,206.05
  6. Step 6: Final answer
    x = 835.34

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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.