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Finding the Fourth Proportional to 802.81, 1,204.09 and 666.73

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Solution

The fourth proportional to 802.81, 1,204.09 and 666.73 is: 999.99

Step by Step Solution

  1. Step 1: Write the proportion equation
    802.81 : 1,204.09 = 666.73 : x
  2. Step 2: Convert to fraction form
    802.81/1,204.09 = 666.73/x
  3. Step 3: Cross multiply
    802.81x = 1,204.09 × 666.73
  4. Step 4: Simplify right side
    802.81x = 802,802.93
  5. Step 5: Solve for x
    x = 802,802.93/802.81
  6. Step 6: Final answer
    x = 999.99

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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.