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Finding the Fourth Proportional to 409,831.80, 614,091.60 and 259,803.60

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Solution

The fourth proportional to 409,831.80, 614,091.60 and 259,803.60 is: 389,289.48

Step by Step Solution

  1. Step 1: Write the proportion equation
    409,831.80 : 614,091.60 = 259,803.60 : x
  2. Step 2: Convert to fraction form
    409,831.80/614,091.60 = 259,803.60/x
  3. Step 3: Cross multiply
    409,831.80x = 614,091.60 × 259,803.60
  4. Step 4: Simplify right side
    409,831.80x = 159,543,208,409.76
  5. Step 5: Solve for x
    x = 159,543,208,409.76/409,831.80
  6. Step 6: Final answer
    x = 389,289.48

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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.