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Finding the Fourth Proportional to 421,995.28, 632,893.55 and 122,396.80

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Solution

The fourth proportional to 421,995.28, 632,893.55 and 122,396.80 is: 183,566.37

Step by Step Solution

  1. Step 1: Write the proportion equation
    421,995.28 : 632,893.55 = 122,396.80 : x
  2. Step 2: Convert to fraction form
    421,995.28/632,893.55 = 122,396.80/x
  3. Step 3: Cross multiply
    421,995.28x = 632,893.55 × 122,396.80
  4. Step 4: Simplify right side
    421,995.28x = 77,464,142,096.17
  5. Step 5: Solve for x
    x = 77,464,142,096.17/421,995.28
  6. Step 6: Final answer
    x = 183,566.37

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1.5x scale

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.