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Finding the Fourth Proportional to 212.40, 295.08 and 210.40

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Solution

The fourth proportional to 212.40, 295.08 and 210.40 is: 292.30

Step by Step Solution

  1. Step 1: Write the proportion equation
    212.40 : 295.08 = 210.40 : x
  2. Step 2: Convert to fraction form
    212.40/295.08 = 210.40/x
  3. Step 3: Cross multiply
    212.40x = 295.08 × 210.40
  4. Step 4: Simplify right side
    212.40x = 62,084.83
  5. Step 5: Solve for x
    x = 62,084.83/212.40
  6. Step 6: Final answer
    x = 292.30

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Why These Related Problems?

These problems maintain the same ratio (1.39) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.