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Finding the Fourth Proportional to 321,313.40, 481,970.10 and 188,343.80

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Solution

The fourth proportional to 321,313.40, 481,970.10 and 188,343.80 is: 282,515.70

Step by Step Solution

  1. Step 1: Write the proportion equation
    321,313.40 : 481,970.10 = 188,343.80 : x
  2. Step 2: Convert to fraction form
    321,313.40/481,970.10 = 188,343.80/x
  3. Step 3: Cross multiply
    321,313.40x = 481,970.10 × 188,343.80
  4. Step 4: Simplify right side
    321,313.40x = 90,776,080,120.38
  5. Step 5: Solve for x
    x = 90,776,080,120.38/321,313.40
  6. Step 6: Final answer
    x = 282,515.70

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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.