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Finding the Fourth Proportional to 900.21, 1,349.77 and 351.74

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Solution

The fourth proportional to 900.21, 1,349.77 and 351.74 is: 527.39

Step by Step Solution

  1. Step 1: Write the proportion equation
    900.21 : 1,349.77 = 351.74 : x
  2. Step 2: Convert to fraction form
    900.21/1,349.77 = 351.74/x
  3. Step 3: Cross multiply
    900.21x = 1,349.77 × 351.74
  4. Step 4: Simplify right side
    900.21x = 474,761.13
  5. Step 5: Solve for x
    x = 474,761.13/900.21
  6. Step 6: Final answer
    x = 527.39

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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.