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Finding the Fourth Proportional to 245,438.30, 338,538.36 and 159,243.30

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Solution

The fourth proportional to 245,438.30, 338,538.36 and 159,243.30 is: 219,647.73

Step by Step Solution

  1. Step 1: Write the proportion equation
    245,438.30 : 338,538.36 = 159,243.30 : x
  2. Step 2: Convert to fraction form
    245,438.30/338,538.36 = 159,243.30/x
  3. Step 3: Cross multiply
    245,438.30x = 338,538.36 × 159,243.30
  4. Step 4: Simplify right side
    245,438.30x = 53,909,965,622.99
  5. Step 5: Solve for x
    x = 53,909,965,622.99/245,438.30
  6. Step 6: Final answer
    x = 219,647.73

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1.5x scale

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.