Home / 1,206.30-1,664.10-708.62

Finding the Fourth Proportional to 1,206.30, 1,664.10 and 708.62

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Solution

The fourth proportional to 1,206.30, 1,664.10 and 708.62 is: 977.54

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,206.30 : 1,664.10 = 708.62 : x
  2. Step 2: Convert to fraction form
    1,206.30/1,664.10 = 708.62/x
  3. Step 3: Cross multiply
    1,206.30x = 1,664.10 × 708.62
  4. Step 4: Simplify right side
    1,206.30x = 1,179,206.22
  5. Step 5: Solve for x
    x = 1,179,206.22/1,206.30
  6. Step 6: Final answer
    x = 977.54

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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.