Home / 280,138.81-386,589.09-152,811.67

Finding the Fourth Proportional to 280,138.81, 386,589.09 and 152,811.67

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Solution

The fourth proportional to 280,138.81, 386,589.09 and 152,811.67 is: 210,878.76

Step by Step Solution

  1. Step 1: Write the proportion equation
    280,138.81 : 386,589.09 = 152,811.67 : x
  2. Step 2: Convert to fraction form
    280,138.81/386,589.09 = 152,811.67/x
  3. Step 3: Cross multiply
    280,138.81x = 386,589.09 × 152,811.67
  4. Step 4: Simplify right side
    280,138.81x = 59,075,324,446.68
  5. Step 5: Solve for x
    x = 59,075,324,446.68/280,138.81
  6. Step 6: Final answer
    x = 210,878.76

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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.