Home / 311,686.76-430,341.18-198,662.60

Finding the Fourth Proportional to 311,686.76, 430,341.18 and 198,662.60

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Solution

The fourth proportional to 311,686.76, 430,341.18 and 198,662.60 is: 274,290.44

Step by Step Solution

  1. Step 1: Write the proportion equation
    311,686.76 : 430,341.18 = 198,662.60 : x
  2. Step 2: Convert to fraction form
    311,686.76/430,341.18 = 198,662.60/x
  3. Step 3: Cross multiply
    311,686.76x = 430,341.18 × 198,662.60
  4. Step 4: Simplify right side
    311,686.76x = 85,492,697,705.87
  5. Step 5: Solve for x
    x = 85,492,697,705.87/311,686.76
  6. Step 6: Final answer
    x = 274,290.44

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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.