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Finding the Fourth Proportional to 320,751.60, 480,795.18 and 263,995.40

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Solution

The fourth proportional to 320,751.60, 480,795.18 and 263,995.40 is: 395,719.67

Step by Step Solution

  1. Step 1: Write the proportion equation
    320,751.60 : 480,795.18 = 263,995.40 : x
  2. Step 2: Convert to fraction form
    320,751.60/480,795.18 = 263,995.40/x
  3. Step 3: Cross multiply
    320,751.60x = 480,795.18 × 263,995.40
  4. Step 4: Simplify right side
    320,751.60x = 126,927,716,074.18
  5. Step 5: Solve for x
    x = 126,927,716,074.18/320,751.60
  6. Step 6: Final answer
    x = 395,719.67

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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.