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Finding the Fourth Proportional to 306,891.50, 423,395.58 and 306,418.34

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Solution

The fourth proportional to 306,891.50, 423,395.58 and 306,418.34 is: 422,742.80

Step by Step Solution

  1. Step 1: Write the proportion equation
    306,891.50 : 423,395.58 = 306,418.34 : x
  2. Step 2: Convert to fraction form
    306,891.50/423,395.58 = 306,418.34/x
  3. Step 3: Cross multiply
    306,891.50x = 423,395.58 × 306,418.34
  4. Step 4: Simplify right side
    306,891.50x = 129,736,170,786.94
  5. Step 5: Solve for x
    x = 129,736,170,786.94/306,891.50
  6. Step 6: Final answer
    x = 422,742.80

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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.