Home / 4,220.80-6,331.20-3,875.20

Finding the Fourth Proportional to 4,220.80, 6,331.20 and 3,875.20

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Solution

The fourth proportional to 4,220.80, 6,331.20 and 3,875.20 is: 5,812.80

Step by Step Solution

  1. Step 1: Write the proportion equation
    4,220.80 : 6,331.20 = 3,875.20 : x
  2. Step 2: Convert to fraction form
    4,220.80/6,331.20 = 3,875.20/x
  3. Step 3: Cross multiply
    4,220.80x = 6,331.20 × 3,875.20
  4. Step 4: Simplify right side
    4,220.80x = 24,534,666.24
  5. Step 5: Solve for x
    x = 24,534,666.24/4,220.80
  6. Step 6: Final answer
    x = 5,812.80

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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.