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Finding the Fourth Proportional to 249.99, 344.55 and 210.50

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Solution

The fourth proportional to 249.99, 344.55 and 210.50 is: 290.13

Step by Step Solution

  1. Step 1: Write the proportion equation
    249.99 : 344.55 = 210.50 : x
  2. Step 2: Convert to fraction form
    249.99/344.55 = 210.50/x
  3. Step 3: Cross multiply
    249.99x = 344.55 × 210.50
  4. Step 4: Simplify right side
    249.99x = 72,528.13
  5. Step 5: Solve for x
    x = 72,528.13/249.99
  6. Step 6: Final answer
    x = 290.13

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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.