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Finding the Fourth Proportional to 308,981.76, 426,309.12 and 174,842.88

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Solution

The fourth proportional to 308,981.76, 426,309.12 and 174,842.88 is: 241,234.67

Step by Step Solution

  1. Step 1: Write the proportion equation
    308,981.76 : 426,309.12 = 174,842.88 : x
  2. Step 2: Convert to fraction form
    308,981.76/426,309.12 = 174,842.88/x
  3. Step 3: Cross multiply
    308,981.76x = 426,309.12 × 174,842.88
  4. Step 4: Simplify right side
    308,981.76x = 74,537,114,311.07
  5. Step 5: Solve for x
    x = 74,537,114,311.07/308,981.76
  6. Step 6: Final answer
    x = 241,234.67

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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.