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Finding the Fourth Proportional to 1,204.79, 1,807.44 and 685.04

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Solution

The fourth proportional to 1,204.79, 1,807.44 and 685.04 is: 1,027.70

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,204.79 : 1,807.44 = 685.04 : x
  2. Step 2: Convert to fraction form
    1,204.79/1,807.44 = 685.04/x
  3. Step 3: Cross multiply
    1,204.79x = 1,807.44 × 685.04
  4. Step 4: Simplify right side
    1,204.79x = 1,238,157.09
  5. Step 5: Solve for x
    x = 1,238,157.09/1,204.79
  6. Step 6: Final answer
    x = 1,027.70

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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.