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Finding the Fourth Proportional to 780,048, 1,170,072 and 189,072

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Solution

The fourth proportional to 780,048, 1,170,072 and 189,072 is: 283,608

Step by Step Solution

  1. Step 1: Write the proportion equation
    780,048 : 1,170,072 = 189,072 : x
  2. Step 2: Convert to fraction form
    780,048/1,170,072 = 189,072/x
  3. Step 3: Cross multiply
    780,048x = 1,170,072 × 189,072
  4. Step 4: Simplify right side
    780,048x = 221,227,853,184
  5. Step 5: Solve for x
    x = 221,227,853,184/780,048
  6. Step 6: Final answer
    x = 283,608

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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.