Home / 306,618.14-422,771-209,868.60

Finding the Fourth Proportional to 306,618.14, 422,771 and 209,868.60

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Solution

The fourth proportional to 306,618.14, 422,771 and 209,868.60 is: 289,370.87

Step by Step Solution

  1. Step 1: Write the proportion equation
    306,618.14 : 422,771 = 209,868.60 : x
  2. Step 2: Convert to fraction form
    306,618.14/422,771 = 209,868.60/x
  3. Step 3: Cross multiply
    306,618.14x = 422,771 × 209,868.60
  4. Step 4: Simplify right side
    306,618.14x = 88,726,357,890.60
  5. Step 5: Solve for x
    x = 88,726,357,890.60/306,618.14
  6. Step 6: Final answer
    x = 289,370.87

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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.