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Finding the Fourth Proportional to 354.08, 488.64 and 214.24

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Solution

The fourth proportional to 354.08, 488.64 and 214.24 is: 295.66

Step by Step Solution

  1. Step 1: Write the proportion equation
    354.08 : 488.64 = 214.24 : x
  2. Step 2: Convert to fraction form
    354.08/488.64 = 214.24/x
  3. Step 3: Cross multiply
    354.08x = 488.64 × 214.24
  4. Step 4: Simplify right side
    354.08x = 104,686.23
  5. Step 5: Solve for x
    x = 104,686.23/354.08
  6. Step 6: Final answer
    x = 295.66

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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.