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Finding the Fourth Proportional to 344.40, 513.75 and 303.90

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Solution

The fourth proportional to 344.40, 513.75 and 303.90 is: 453.34

Step by Step Solution

  1. Step 1: Write the proportion equation
    344.40 : 513.75 = 303.90 : x
  2. Step 2: Convert to fraction form
    344.40/513.75 = 303.90/x
  3. Step 3: Cross multiply
    344.40x = 513.75 × 303.90
  4. Step 4: Simplify right side
    344.40x = 156,128.63
  5. Step 5: Solve for x
    x = 156,128.63/344.40
  6. Step 6: Final answer
    x = 453.34

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Why These Related Problems?

These problems maintain the same ratio (1.49) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.