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Finding the Fourth Proportional to 332.78, 498.45 and 210.74

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Solution

The fourth proportional to 332.78, 498.45 and 210.74 is: 315.65

Step by Step Solution

  1. Step 1: Write the proportion equation
    332.78 : 498.45 = 210.74 : x
  2. Step 2: Convert to fraction form
    332.78/498.45 = 210.74/x
  3. Step 3: Cross multiply
    332.78x = 498.45 × 210.74
  4. Step 4: Simplify right side
    332.78x = 105,043.35
  5. Step 5: Solve for x
    x = 105,043.35/332.78
  6. Step 6: Final answer
    x = 315.65

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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.