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Finding the Fourth Proportional to 421,988.40, 632,883.24 and 122,389.92

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Solution

The fourth proportional to 421,988.40, 632,883.24 and 122,389.92 is: 183,556.06

Step by Step Solution

  1. Step 1: Write the proportion equation
    421,988.40 : 632,883.24 = 122,389.92 : x
  2. Step 2: Convert to fraction form
    421,988.40/632,883.24 = 122,389.92/x
  3. Step 3: Cross multiply
    421,988.40x = 632,883.24 × 122,389.92
  4. Step 4: Simplify right side
    421,988.40x = 77,458,529,112.94
  5. Step 5: Solve for x
    x = 77,458,529,112.94/421,988.40
  6. Step 6: Final answer
    x = 183,556.06

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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.