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Finding the Fourth Proportional to 313,908.80, 470,863.20 and 207,620.60

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Solution

The fourth proportional to 313,908.80, 470,863.20 and 207,620.60 is: 311,430.90

Step by Step Solution

  1. Step 1: Write the proportion equation
    313,908.80 : 470,863.20 = 207,620.60 : x
  2. Step 2: Convert to fraction form
    313,908.80/470,863.20 = 207,620.60/x
  3. Step 3: Cross multiply
    313,908.80x = 470,863.20 × 207,620.60
  4. Step 4: Simplify right side
    313,908.80x = 97,760,900,101.92
  5. Step 5: Solve for x
    x = 97,760,900,101.92/313,908.80
  6. Step 6: Final answer
    x = 311,430.90

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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.