Home / 815,179.95-1,222,981.34-309,749.67

Finding the Fourth Proportional to 815,179.95, 1,222,981.34 and 309,749.67

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Solution

The fourth proportional to 815,179.95, 1,222,981.34 and 309,749.67 is: 464,704.84

Step by Step Solution

  1. Step 1: Write the proportion equation
    815,179.95 : 1,222,981.34 = 309,749.67 : x
  2. Step 2: Convert to fraction form
    815,179.95/1,222,981.34 = 309,749.67/x
  3. Step 3: Cross multiply
    815,179.95x = 1,222,981.34 × 309,749.67
  4. Step 4: Simplify right side
    815,179.95x = 378,818,064,932.41
  5. Step 5: Solve for x
    x = 378,818,064,932.41/815,179.95
  6. Step 6: Final answer
    x = 464,704.84

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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.