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Finding the Fourth Proportional to 165.69, 228.69 and 145.17

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Solution

The fourth proportional to 165.69, 228.69 and 145.17 is: 200.37

Step by Step Solution

  1. Step 1: Write the proportion equation
    165.69 : 228.69 = 145.17 : x
  2. Step 2: Convert to fraction form
    165.69/228.69 = 145.17/x
  3. Step 3: Cross multiply
    165.69x = 228.69 × 145.17
  4. Step 4: Simplify right side
    165.69x = 33,198.93
  5. Step 5: Solve for x
    x = 33,198.93/165.69
  6. Step 6: Final answer
    x = 200.37

Related Problems

Find fourth proportional to 82.85, 114.35 and 72.59
Half scale
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Double scale
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1.5x scale

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.