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Finding the Fourth Proportional to 430.22, 644.44 and 356.92

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Solution

The fourth proportional to 430.22, 644.44 and 356.92 is: 534.65

Step by Step Solution

  1. Step 1: Write the proportion equation
    430.22 : 644.44 = 356.92 : x
  2. Step 2: Convert to fraction form
    430.22/644.44 = 356.92/x
  3. Step 3: Cross multiply
    430.22x = 644.44 × 356.92
  4. Step 4: Simplify right side
    430.22x = 230,015.32
  5. Step 5: Solve for x
    x = 230,015.32/430.22
  6. Step 6: Final answer
    x = 534.65

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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.