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Finding the Fourth Proportional to 434.05, 651.31 and 287.44

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Solution

The fourth proportional to 434.05, 651.31 and 287.44 is: 431.31

Step by Step Solution

  1. Step 1: Write the proportion equation
    434.05 : 651.31 = 287.44 : x
  2. Step 2: Convert to fraction form
    434.05/651.31 = 287.44/x
  3. Step 3: Cross multiply
    434.05x = 651.31 × 287.44
  4. Step 4: Simplify right side
    434.05x = 187,210.20
  5. Step 5: Solve for x
    x = 187,210.20/434.05
  6. Step 6: Final answer
    x = 431.31

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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.