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Finding the Fourth Proportional to 262,471.50, 393,769.95 and 84,978.69

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Solution

The fourth proportional to 262,471.50, 393,769.95 and 84,978.69 is: 127,488.33

Step by Step Solution

  1. Step 1: Write the proportion equation
    262,471.50 : 393,769.95 = 84,978.69 : x
  2. Step 2: Convert to fraction form
    262,471.50/393,769.95 = 84,978.69/x
  3. Step 3: Cross multiply
    262,471.50x = 393,769.95 × 84,978.69
  4. Step 4: Simplify right side
    262,471.50x = 33,462,054,512.37
  5. Step 5: Solve for x
    x = 33,462,054,512.37/262,471.50
  6. Step 6: Final answer
    x = 127,488.33

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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.