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Finding the Fourth Proportional to 368.15, 551.99 and 145.51

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Solution

The fourth proportional to 368.15, 551.99 and 145.51 is: 218.17

Step by Step Solution

  1. Step 1: Write the proportion equation
    368.15 : 551.99 = 145.51 : x
  2. Step 2: Convert to fraction form
    368.15/551.99 = 145.51/x
  3. Step 3: Cross multiply
    368.15x = 551.99 × 145.51
  4. Step 4: Simplify right side
    368.15x = 80,319.05
  5. Step 5: Solve for x
    x = 80,319.05/368.15
  6. Step 6: Final answer
    x = 218.17

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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.