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Finding the Fourth Proportional to 903.34, 1,354.21 and 355.91

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Solution

The fourth proportional to 903.34, 1,354.21 and 355.91 is: 533.55

Step by Step Solution

  1. Step 1: Write the proportion equation
    903.34 : 1,354.21 = 355.91 : x
  2. Step 2: Convert to fraction form
    903.34/1,354.21 = 355.91/x
  3. Step 3: Cross multiply
    903.34x = 1,354.21 × 355.91
  4. Step 4: Simplify right side
    903.34x = 481,976.88
  5. Step 5: Solve for x
    x = 481,976.88/903.34
  6. Step 6: Final answer
    x = 533.55

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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.