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Finding the Fourth Proportional to 354.21, 488.36 and 295.28

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Solution

The fourth proportional to 354.21, 488.36 and 295.28 is: 407.12

Step by Step Solution

  1. Step 1: Write the proportion equation
    354.21 : 488.36 = 295.28 : x
  2. Step 2: Convert to fraction form
    354.21/488.36 = 295.28/x
  3. Step 3: Cross multiply
    354.21x = 488.36 × 295.28
  4. Step 4: Simplify right side
    354.21x = 144,203.07
  5. Step 5: Solve for x
    x = 144,203.07/354.21
  6. Step 6: Final answer
    x = 407.12

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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.