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Finding the Fourth Proportional to 768.08, 1,152.12 and 356.72

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Solution

The fourth proportional to 768.08, 1,152.12 and 356.72 is: 535.08

Step by Step Solution

  1. Step 1: Write the proportion equation
    768.08 : 1,152.12 = 356.72 : x
  2. Step 2: Convert to fraction form
    768.08/1,152.12 = 356.72/x
  3. Step 3: Cross multiply
    768.08x = 1,152.12 × 356.72
  4. Step 4: Simplify right side
    768.08x = 410,984.25
  5. Step 5: Solve for x
    x = 410,984.25/768.08
  6. Step 6: Final answer
    x = 535.08

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Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.