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Finding the Fourth Proportional to 397,656.72, 548,969.58 and 306,808.56

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Solution

The fourth proportional to 397,656.72, 548,969.58 and 306,808.56 is: 423,552.67

Step by Step Solution

  1. Step 1: Write the proportion equation
    397,656.72 : 548,969.58 = 306,808.56 : x
  2. Step 2: Convert to fraction form
    397,656.72/548,969.58 = 306,808.56/x
  3. Step 3: Cross multiply
    397,656.72x = 548,969.58 × 306,808.56
  4. Step 4: Simplify right side
    397,656.72x = 168,428,566,323.61
  5. Step 5: Solve for x
    x = 168,428,566,323.61/397,656.72
  6. Step 6: Final answer
    x = 423,552.67

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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.