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Finding the Fourth Proportional to 899.20, 1,348.79 and 351.77

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Solution

The fourth proportional to 899.20, 1,348.79 and 351.77 is: 527.64

Step by Step Solution

  1. Step 1: Write the proportion equation
    899.20 : 1,348.79 = 351.77 : x
  2. Step 2: Convert to fraction form
    899.20/1,348.79 = 351.77/x
  3. Step 3: Cross multiply
    899.20x = 1,348.79 × 351.77
  4. Step 4: Simplify right side
    899.20x = 474,455.36
  5. Step 5: Solve for x
    x = 474,455.36/899.20
  6. Step 6: Final answer
    x = 527.64

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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.