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Finding the Fourth Proportional to 308,811.40, 462,525.90 and 253,515.40

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Solution

The fourth proportional to 308,811.40, 462,525.90 and 253,515.40 is: 379,705.67

Step by Step Solution

  1. Step 1: Write the proportion equation
    308,811.40 : 462,525.90 = 253,515.40 : x
  2. Step 2: Convert to fraction form
    308,811.40/462,525.90 = 253,515.40/x
  3. Step 3: Cross multiply
    308,811.40x = 462,525.90 × 253,515.40
  4. Step 4: Simplify right side
    308,811.40x = 117,257,438,548.86
  5. Step 5: Solve for x
    x = 117,257,438,548.86/308,811.40
  6. Step 6: Final answer
    x = 379,705.67

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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.