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Finding the Fourth Proportional to 1,204.72, 1,807.05 and 817.30

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Solution

The fourth proportional to 1,204.72, 1,807.05 and 817.30 is: 1,225.93

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,204.72 : 1,807.05 = 817.30 : x
  2. Step 2: Convert to fraction form
    1,204.72/1,807.05 = 817.30/x
  3. Step 3: Cross multiply
    1,204.72x = 1,807.05 × 817.30
  4. Step 4: Simplify right side
    1,204.72x = 1,476,901.97
  5. Step 5: Solve for x
    x = 1,476,901.97/1,204.72
  6. Step 6: Final answer
    x = 1,225.93

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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.