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Finding the Fourth Proportional to 666,367.86, 919,706.04 and 394,586.64

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Solution

The fourth proportional to 666,367.86, 919,706.04 and 394,586.64 is: 544,599.67

Step by Step Solution

  1. Step 1: Write the proportion equation
    666,367.86 : 919,706.04 = 394,586.64 : x
  2. Step 2: Convert to fraction form
    666,367.86/919,706.04 = 394,586.64/x
  3. Step 3: Cross multiply
    666,367.86x = 919,706.04 × 394,586.64
  4. Step 4: Simplify right side
    666,367.86x = 362,903,716,111.31
  5. Step 5: Solve for x
    x = 362,903,716,111.31/666,367.86
  6. Step 6: Final answer
    x = 544,599.67

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Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.