Home / 280,778.31-421,334.19-103,409.73

Finding the Fourth Proportional to 280,778.31, 421,334.19 and 103,409.73

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Solution

The fourth proportional to 280,778.31, 421,334.19 and 103,409.73 is: 155,176.00

Step by Step Solution

  1. Step 1: Write the proportion equation
    280,778.31 : 421,334.19 = 103,409.73 : x
  2. Step 2: Convert to fraction form
    280,778.31/421,334.19 = 103,409.73/x
  3. Step 3: Cross multiply
    280,778.31x = 421,334.19 × 103,409.73
  4. Step 4: Simplify right side
    280,778.31x = 43,570,054,827.67
  5. Step 5: Solve for x
    x = 43,570,054,827.67/280,778.31
  6. Step 6: Final answer
    x = 155,176.00

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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.