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Finding the Fourth Proportional to 306,344.80, 422,626.80 and 221,275.36

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Solution

The fourth proportional to 306,344.80, 422,626.80 and 221,275.36 is: 305,266.80

Step by Step Solution

  1. Step 1: Write the proportion equation
    306,344.80 : 422,626.80 = 221,275.36 : x
  2. Step 2: Convert to fraction form
    306,344.80/422,626.80 = 221,275.36/x
  3. Step 3: Cross multiply
    306,344.80x = 422,626.80 × 221,275.36
  4. Step 4: Simplify right side
    306,344.80x = 93,516,897,315.65
  5. Step 5: Solve for x
    x = 93,516,897,315.65/306,344.80
  6. Step 6: Final answer
    x = 305,266.80

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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.