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Finding the Fourth Proportional to 245,315.28, 338,544.66 and 137,884.98

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Solution

The fourth proportional to 245,315.28, 338,544.66 and 137,884.98 is: 190,286.65

Step by Step Solution

  1. Step 1: Write the proportion equation
    245,315.28 : 338,544.66 = 137,884.98 : x
  2. Step 2: Convert to fraction form
    245,315.28/338,544.66 = 137,884.98/x
  3. Step 3: Cross multiply
    245,315.28x = 338,544.66 × 137,884.98
  4. Step 4: Simplify right side
    245,315.28x = 46,680,223,673.21
  5. Step 5: Solve for x
    x = 46,680,223,673.21/245,315.28
  6. Step 6: Final answer
    x = 190,286.65

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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.