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Finding the Fourth Proportional to 802.63, 1,204.44 and 391.87

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Solution

The fourth proportional to 802.63, 1,204.44 and 391.87 is: 588.05

Step by Step Solution

  1. Step 1: Write the proportion equation
    802.63 : 1,204.44 = 391.87 : x
  2. Step 2: Convert to fraction form
    802.63/1,204.44 = 391.87/x
  3. Step 3: Cross multiply
    802.63x = 1,204.44 × 391.87
  4. Step 4: Simplify right side
    802.63x = 471,983.90
  5. Step 5: Solve for x
    x = 471,983.90/802.63
  6. Step 6: Final answer
    x = 588.05

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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.