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Finding the Fourth Proportional to 311,803.21, 430,287.15 and 168,563.22

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Solution

The fourth proportional to 311,803.21, 430,287.15 and 168,563.22 is: 232,616.55

Step by Step Solution

  1. Step 1: Write the proportion equation
    311,803.21 : 430,287.15 = 168,563.22 : x
  2. Step 2: Convert to fraction form
    311,803.21/430,287.15 = 168,563.22/x
  3. Step 3: Cross multiply
    311,803.21x = 430,287.15 × 168,563.22
  4. Step 4: Simplify right side
    311,803.21x = 72,530,587,528.62
  5. Step 5: Solve for x
    x = 72,530,587,528.62/311,803.21
  6. Step 6: Final answer
    x = 232,616.55

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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.