Home / 813,939.20-1,221,346.20-340,672.40

Finding the Fourth Proportional to 813,939.20, 1,221,346.20 and 340,672.40

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Solution

The fourth proportional to 813,939.20, 1,221,346.20 and 340,672.40 is: 511,191.67

Step by Step Solution

  1. Step 1: Write the proportion equation
    813,939.20 : 1,221,346.20 = 340,672.40 : x
  2. Step 2: Convert to fraction form
    813,939.20/1,221,346.20 = 340,672.40/x
  3. Step 3: Cross multiply
    813,939.20x = 1,221,346.20 × 340,672.40
  4. Step 4: Simplify right side
    813,939.20x = 416,078,941,184.88
  5. Step 5: Solve for x
    x = 416,078,941,184.88/813,939.20
  6. Step 6: Final answer
    x = 511,191.67

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.