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Finding the Fourth Proportional to 1,206.63, 1,809.81 and 340.88

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Solution

The fourth proportional to 1,206.63, 1,809.81 and 340.88 is: 511.27

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,206.63 : 1,809.81 = 340.88 : x
  2. Step 2: Convert to fraction form
    1,206.63/1,809.81 = 340.88/x
  3. Step 3: Cross multiply
    1,206.63x = 1,809.81 × 340.88
  4. Step 4: Simplify right side
    1,206.63x = 616,918.98
  5. Step 5: Solve for x
    x = 616,918.98/1,206.63
  6. Step 6: Final answer
    x = 511.27

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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.