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Finding the Fourth Proportional to 357.86, 493.80 and 210.50

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Solution

The fourth proportional to 357.86, 493.80 and 210.50 is: 290.46

Step by Step Solution

  1. Step 1: Write the proportion equation
    357.86 : 493.80 = 210.50 : x
  2. Step 2: Convert to fraction form
    357.86/493.80 = 210.50/x
  3. Step 3: Cross multiply
    357.86x = 493.80 × 210.50
  4. Step 4: Simplify right side
    357.86x = 103,944.90
  5. Step 5: Solve for x
    x = 103,944.90/357.86
  6. Step 6: Final answer
    x = 290.46

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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.