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Finding the Fourth Proportional to 1,206.99, 1,665.80 and 683.02

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Solution

The fourth proportional to 1,206.99, 1,665.80 and 683.02 is: 942.65

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,206.99 : 1,665.80 = 683.02 : x
  2. Step 2: Convert to fraction form
    1,206.99/1,665.80 = 683.02/x
  3. Step 3: Cross multiply
    1,206.99x = 1,665.80 × 683.02
  4. Step 4: Simplify right side
    1,206.99x = 1,137,774.72
  5. Step 5: Solve for x
    x = 1,137,774.72/1,206.99
  6. Step 6: Final answer
    x = 942.65

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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.