Home / 4,880.40-7,320.60-3,130.80

Finding the Fourth Proportional to 4,880.40, 7,320.60 and 3,130.80

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Solution

The fourth proportional to 4,880.40, 7,320.60 and 3,130.80 is: 4,696.20

Step by Step Solution

  1. Step 1: Write the proportion equation
    4,880.40 : 7,320.60 = 3,130.80 : x
  2. Step 2: Convert to fraction form
    4,880.40/7,320.60 = 3,130.80/x
  3. Step 3: Cross multiply
    4,880.40x = 7,320.60 × 3,130.80
  4. Step 4: Simplify right side
    4,880.40x = 22,919,334.48
  5. Step 5: Solve for x
    x = 22,919,334.48/4,880.40
  6. Step 6: Final answer
    x = 4,696.20

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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.