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Finding the Fourth Proportional to 332.60, 498.90 and 211.40

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Solution

The fourth proportional to 332.60, 498.90 and 211.40 is: 317.10

Step by Step Solution

  1. Step 1: Write the proportion equation
    332.60 : 498.90 = 211.40 : x
  2. Step 2: Convert to fraction form
    332.60/498.90 = 211.40/x
  3. Step 3: Cross multiply
    332.60x = 498.90 × 211.40
  4. Step 4: Simplify right side
    332.60x = 105,467.46
  5. Step 5: Solve for x
    x = 105,467.46/332.60
  6. Step 6: Final answer
    x = 317.10

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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.