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Finding the Fourth Proportional to 153.65, 228.96 and 147.85

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Solution

The fourth proportional to 153.65, 228.96 and 147.85 is: 220.31

Step by Step Solution

  1. Step 1: Write the proportion equation
    153.65 : 228.96 = 147.85 : x
  2. Step 2: Convert to fraction form
    153.65/228.96 = 147.85/x
  3. Step 3: Cross multiply
    153.65x = 228.96 × 147.85
  4. Step 4: Simplify right side
    153.65x = 33,851.16
  5. Step 5: Solve for x
    x = 33,851.16/153.65
  6. Step 6: Final answer
    x = 220.31

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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.