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Finding the Fourth Proportional to 421,883.79, 632,725.96 and 155,499.63

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Solution

The fourth proportional to 421,883.79, 632,725.96 and 155,499.63 is: 233,212.69

Step by Step Solution

  1. Step 1: Write the proportion equation
    421,883.79 : 632,725.96 = 155,499.63 : x
  2. Step 2: Convert to fraction form
    421,883.79/632,725.96 = 155,499.63/x
  3. Step 3: Cross multiply
    421,883.79x = 632,725.96 × 155,499.63
  4. Step 4: Simplify right side
    421,883.79x = 98,388,652,671.39
  5. Step 5: Solve for x
    x = 98,388,652,671.39/421,883.79
  6. Step 6: Final answer
    x = 233,212.69

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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.