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Finding the Fourth Proportional to 610.45, 842.43 and 389.36

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Solution

The fourth proportional to 610.45, 842.43 and 389.36 is: 537.32

Step by Step Solution

  1. Step 1: Write the proportion equation
    610.45 : 842.43 = 389.36 : x
  2. Step 2: Convert to fraction form
    610.45/842.43 = 389.36/x
  3. Step 3: Cross multiply
    610.45x = 842.43 × 389.36
  4. Step 4: Simplify right side
    610.45x = 328,007.37
  5. Step 5: Solve for x
    x = 328,007.37/610.45
  6. Step 6: Final answer
    x = 537.32

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Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.