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Finding the Fourth Proportional to 145.51, 219.43 and 143.48

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Solution

The fourth proportional to 145.51, 219.43 and 143.48 is: 216.38

Step by Step Solution

  1. Step 1: Write the proportion equation
    145.51 : 219.43 = 143.48 : x
  2. Step 2: Convert to fraction form
    145.51/219.43 = 143.48/x
  3. Step 3: Cross multiply
    145.51x = 219.43 × 143.48
  4. Step 4: Simplify right side
    145.51x = 31,484.54
  5. Step 5: Solve for x
    x = 31,484.54/145.51
  6. Step 6: Final answer
    x = 216.38

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Why These Related Problems?

These problems maintain the same ratio (1.51) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.