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Finding the Fourth Proportional to 421,991.28, 632,522.52 and 208,443.02

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Solution

The fourth proportional to 421,991.28, 632,522.52 and 208,443.02 is: 312,435.13

Step by Step Solution

  1. Step 1: Write the proportion equation
    421,991.28 : 632,522.52 = 208,443.02 : x
  2. Step 2: Convert to fraction form
    421,991.28/632,522.52 = 208,443.02/x
  3. Step 3: Cross multiply
    421,991.28x = 632,522.52 × 208,443.02
  4. Step 4: Simplify right side
    421,991.28x = 131,844,901,124.20
  5. Step 5: Solve for x
    x = 131,844,901,124.20/421,991.28
  6. Step 6: Final answer
    x = 312,435.13

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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.