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Finding the Fourth Proportional to 421,056.36, 630,452.77 and 320,738.67

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Solution

The fourth proportional to 421,056.36, 630,452.77 and 320,738.67 is: 480,245.88

Step by Step Solution

  1. Step 1: Write the proportion equation
    421,056.36 : 630,452.77 = 320,738.67 : x
  2. Step 2: Convert to fraction form
    421,056.36/630,452.77 = 320,738.67/x
  3. Step 3: Cross multiply
    421,056.36x = 630,452.77 × 320,738.67
  4. Step 4: Simplify right side
    421,056.36x = 202,210,582,947.62
  5. Step 5: Solve for x
    x = 202,210,582,947.62/421,056.36
  6. Step 6: Final answer
    x = 480,245.88

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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.