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Finding the Fourth Proportional to 245,458.32, 338,730.84 and 138,028.56

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Solution

The fourth proportional to 245,458.32, 338,730.84 and 138,028.56 is: 190,478.49

Step by Step Solution

  1. Step 1: Write the proportion equation
    245,458.32 : 338,730.84 = 138,028.56 : x
  2. Step 2: Convert to fraction form
    245,458.32/338,730.84 = 138,028.56/x
  3. Step 3: Cross multiply
    245,458.32x = 338,730.84 × 138,028.56
  4. Step 4: Simplify right side
    245,458.32x = 46,754,530,072.79
  5. Step 5: Solve for x
    x = 46,754,530,072.79/245,458.32
  6. Step 6: Final answer
    x = 190,478.49

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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.