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Finding the Fourth Proportional to 468.45, 646.48 and 258.64

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Solution

The fourth proportional to 468.45, 646.48 and 258.64 is: 356.93

Step by Step Solution

  1. Step 1: Write the proportion equation
    468.45 : 646.48 = 258.64 : x
  2. Step 2: Convert to fraction form
    468.45/646.48 = 258.64/x
  3. Step 3: Cross multiply
    468.45x = 646.48 × 258.64
  4. Step 4: Simplify right side
    468.45x = 167,205.59
  5. Step 5: Solve for x
    x = 167,205.59/468.45
  6. Step 6: Final answer
    x = 356.93

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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.