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Finding the Fourth Proportional to 153.28, 228.59 and 145.18

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Solution

The fourth proportional to 153.28, 228.59 and 145.18 is: 216.51

Step by Step Solution

  1. Step 1: Write the proportion equation
    153.28 : 228.59 = 145.18 : x
  2. Step 2: Convert to fraction form
    153.28/228.59 = 145.18/x
  3. Step 3: Cross multiply
    153.28x = 228.59 × 145.18
  4. Step 4: Simplify right side
    153.28x = 33,186.70
  5. Step 5: Solve for x
    x = 33,186.70/153.28
  6. Step 6: Final answer
    x = 216.51

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Why These Related Problems?

These problems maintain the same ratio (1.49) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.