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Finding the Fourth Proportional to 803, 1,204.32 and 391.94

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Solution

The fourth proportional to 803, 1,204.32 and 391.94 is: 587.82

Step by Step Solution

  1. Step 1: Write the proportion equation
    803 : 1,204.32 = 391.94 : x
  2. Step 2: Convert to fraction form
    803/1,204.32 = 391.94/x
  3. Step 3: Cross multiply
    803x = 1,204.32 × 391.94
  4. Step 4: Simplify right side
    803x = 472,021.18
  5. Step 5: Solve for x
    x = 472,021.18/803
  6. Step 6: Final answer
    x = 587.82

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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.