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Finding the Fourth Proportional to 313,958.40, 470,851.20 and 126,988.80

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Solution

The fourth proportional to 313,958.40, 470,851.20 and 126,988.80 is: 190,448.25

Step by Step Solution

  1. Step 1: Write the proportion equation
    313,958.40 : 470,851.20 = 126,988.80 : x
  2. Step 2: Convert to fraction form
    313,958.40/470,851.20 = 126,988.80/x
  3. Step 3: Cross multiply
    313,958.40x = 470,851.20 × 126,988.80
  4. Step 4: Simplify right side
    313,958.40x = 59,792,828,866.56
  5. Step 5: Solve for x
    x = 59,792,828,866.56/313,958.40
  6. Step 6: Final answer
    x = 190,448.25

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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.