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Finding the Fourth Proportional to 357.98, 493.95 and 210.56

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Solution

The fourth proportional to 357.98, 493.95 and 210.56 is: 290.54

Step by Step Solution

  1. Step 1: Write the proportion equation
    357.98 : 493.95 = 210.56 : x
  2. Step 2: Convert to fraction form
    357.98/493.95 = 210.56/x
  3. Step 3: Cross multiply
    357.98x = 493.95 × 210.56
  4. Step 4: Simplify right side
    357.98x = 104,006.11
  5. Step 5: Solve for x
    x = 104,006.11/357.98
  6. Step 6: Final answer
    x = 290.54

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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.