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Finding the Fourth Proportional to 271,490.60, 406,976.70 and 211,485.80

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Solution

The fourth proportional to 271,490.60, 406,976.70 and 211,485.80 is: 317,026.79

Step by Step Solution

  1. Step 1: Write the proportion equation
    271,490.60 : 406,976.70 = 211,485.80 : x
  2. Step 2: Convert to fraction form
    271,490.60/406,976.70 = 211,485.80/x
  3. Step 3: Cross multiply
    271,490.60x = 406,976.70 × 211,485.80
  4. Step 4: Simplify right side
    271,490.60x = 86,069,792,980.86
  5. Step 5: Solve for x
    x = 86,069,792,980.86/271,490.60
  6. Step 6: Final answer
    x = 317,026.79

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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.