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Finding the Fourth Proportional to 313,964.80, 470,947.20 and 274,598.80

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Solution

The fourth proportional to 313,964.80, 470,947.20 and 274,598.80 is: 411,898.20

Step by Step Solution

  1. Step 1: Write the proportion equation
    313,964.80 : 470,947.20 = 274,598.80 : x
  2. Step 2: Convert to fraction form
    313,964.80/470,947.20 = 274,598.80/x
  3. Step 3: Cross multiply
    313,964.80x = 470,947.20 × 274,598.80
  4. Step 4: Simplify right side
    313,964.80x = 129,321,535,983.36
  5. Step 5: Solve for x
    x = 129,321,535,983.36/313,964.80
  6. Step 6: Final answer
    x = 411,898.20

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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.