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Finding the Fourth Proportional to 321,246.40, 443,313.40 and 178,005.16

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Solution

The fourth proportional to 321,246.40, 443,313.40 and 178,005.16 is: 245,643.45

Step by Step Solution

  1. Step 1: Write the proportion equation
    321,246.40 : 443,313.40 = 178,005.16 : x
  2. Step 2: Convert to fraction form
    321,246.40/443,313.40 = 178,005.16/x
  3. Step 3: Cross multiply
    321,246.40x = 443,313.40 × 178,005.16
  4. Step 4: Simplify right side
    321,246.40x = 78,912,072,697.14
  5. Step 5: Solve for x
    x = 78,912,072,697.14/321,246.40
  6. Step 6: Final answer
    x = 245,643.45

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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.