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Finding the Fourth Proportional to 295.68, 405.09 and 284.60

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Solution

The fourth proportional to 295.68, 405.09 and 284.60 is: 389.90

Step by Step Solution

  1. Step 1: Write the proportion equation
    295.68 : 405.09 = 284.60 : x
  2. Step 2: Convert to fraction form
    295.68/405.09 = 284.60/x
  3. Step 3: Cross multiply
    295.68x = 405.09 × 284.60
  4. Step 4: Simplify right side
    295.68x = 115,287.90
  5. Step 5: Solve for x
    x = 115,287.90/295.68
  6. Step 6: Final answer
    x = 389.90

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Why These Related Problems?

These problems maintain the same ratio (1.37) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.