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Finding the Fourth Proportional to 145.47, 200.64 and 119.28

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Solution

The fourth proportional to 145.47, 200.64 and 119.28 is: 164.52

Step by Step Solution

  1. Step 1: Write the proportion equation
    145.47 : 200.64 = 119.28 : x
  2. Step 2: Convert to fraction form
    145.47/200.64 = 119.28/x
  3. Step 3: Cross multiply
    145.47x = 200.64 × 119.28
  4. Step 4: Simplify right side
    145.47x = 23,932.34
  5. Step 5: Solve for x
    x = 23,932.34/145.47
  6. Step 6: Final answer
    x = 164.52

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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.