Home / 311,731.20-430,189-168,491.22

Finding the Fourth Proportional to 311,731.20, 430,189 and 168,491.22

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Solution

The fourth proportional to 311,731.20, 430,189 and 168,491.22 is: 232,517.85

Step by Step Solution

  1. Step 1: Write the proportion equation
    311,731.20 : 430,189 = 168,491.22 : x
  2. Step 2: Convert to fraction form
    311,731.20/430,189 = 168,491.22/x
  3. Step 3: Cross multiply
    311,731.20x = 430,189 × 168,491.22
  4. Step 4: Simplify right side
    311,731.20x = 72,483,069,440.58
  5. Step 5: Solve for x
    x = 72,483,069,440.58/311,731.20
  6. Step 6: Final answer
    x = 232,517.85

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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.