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Finding the Fourth Proportional to 421,879.59, 632,871.63 and 155,641.50

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Solution

The fourth proportional to 421,879.59, 632,871.63 and 155,641.50 is: 233,481.52

Step by Step Solution

  1. Step 1: Write the proportion equation
    421,879.59 : 632,871.63 = 155,641.50 : x
  2. Step 2: Convert to fraction form
    421,879.59/632,871.63 = 155,641.50/x
  3. Step 3: Cross multiply
    421,879.59x = 632,871.63 × 155,641.50
  4. Step 4: Simplify right side
    421,879.59x = 98,501,089,800.65
  5. Step 5: Solve for x
    x = 98,501,089,800.65/421,879.59
  6. Step 6: Final answer
    x = 233,481.52

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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.