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Finding the Fourth Proportional to 483.11, 722.85 and 287.39

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Solution

The fourth proportional to 483.11, 722.85 and 287.39 is: 430.01

Step by Step Solution

  1. Step 1: Write the proportion equation
    483.11 : 722.85 = 287.39 : x
  2. Step 2: Convert to fraction form
    483.11/722.85 = 287.39/x
  3. Step 3: Cross multiply
    483.11x = 722.85 × 287.39
  4. Step 4: Simplify right side
    483.11x = 207,739.86
  5. Step 5: Solve for x
    x = 207,739.86/483.11
  6. Step 6: Final answer
    x = 430.01

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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.