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Finding the Fourth Proportional to 287.02, 429.88 and 218.98

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Solution

The fourth proportional to 287.02, 429.88 and 218.98 is: 327.97

Step by Step Solution

  1. Step 1: Write the proportion equation
    287.02 : 429.88 = 218.98 : x
  2. Step 2: Convert to fraction form
    287.02/429.88 = 218.98/x
  3. Step 3: Cross multiply
    287.02x = 429.88 × 218.98
  4. Step 4: Simplify right side
    287.02x = 94,135.12
  5. Step 5: Solve for x
    x = 94,135.12/287.02
  6. Step 6: Final answer
    x = 327.97

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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.