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Finding the Fourth Proportional to 228.32, 314.95 and 145.28

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Solution

The fourth proportional to 228.32, 314.95 and 145.28 is: 200.40

Step by Step Solution

  1. Step 1: Write the proportion equation
    228.32 : 314.95 = 145.28 : x
  2. Step 2: Convert to fraction form
    228.32/314.95 = 145.28/x
  3. Step 3: Cross multiply
    228.32x = 314.95 × 145.28
  4. Step 4: Simplify right side
    228.32x = 45,755.94
  5. Step 5: Solve for x
    x = 45,755.94/228.32
  6. Step 6: Final answer
    x = 200.40

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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.