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Finding the Fourth Proportional to 357.45, 493.32 and 210.07

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Solution

The fourth proportional to 357.45, 493.32 and 210.07 is: 289.92

Step by Step Solution

  1. Step 1: Write the proportion equation
    357.45 : 493.32 = 210.07 : x
  2. Step 2: Convert to fraction form
    357.45/493.32 = 210.07/x
  3. Step 3: Cross multiply
    357.45x = 493.32 × 210.07
  4. Step 4: Simplify right side
    357.45x = 103,631.73
  5. Step 5: Solve for x
    x = 103,631.73/357.45
  6. Step 6: Final answer
    x = 289.92

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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.