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Finding the Fourth Proportional to 421,579.89, 632,350.40 and 155,322.36

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Solution

The fourth proportional to 421,579.89, 632,350.40 and 155,322.36 is: 232,976.38

Step by Step Solution

  1. Step 1: Write the proportion equation
    421,579.89 : 632,350.40 = 155,322.36 : x
  2. Step 2: Convert to fraction form
    421,579.89/632,350.40 = 155,322.36/x
  3. Step 3: Cross multiply
    421,579.89x = 632,350.40 × 155,322.36
  4. Step 4: Simplify right side
    421,579.89x = 98,218,155,698.33
  5. Step 5: Solve for x
    x = 98,218,155,698.33/421,579.89
  6. Step 6: Final answer
    x = 232,976.38

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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.