Home / 642,120.12-886,091.45-351,716.67

Finding the Fourth Proportional to 642,120.12, 886,091.45 and 351,716.67

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Solution

The fourth proportional to 642,120.12, 886,091.45 and 351,716.67 is: 485,350.21

Step by Step Solution

  1. Step 1: Write the proportion equation
    642,120.12 : 886,091.45 = 351,716.67 : x
  2. Step 2: Convert to fraction form
    642,120.12/886,091.45 = 351,716.67/x
  3. Step 3: Cross multiply
    642,120.12x = 886,091.45 × 351,716.67
  4. Step 4: Simplify right side
    642,120.12x = 311,653,132,350.89
  5. Step 5: Solve for x
    x = 311,653,132,350.89/642,120.12
  6. Step 6: Final answer
    x = 485,350.21

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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.