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Finding the Fourth Proportional to 483,612.40, 725,418.60 and 128,662.30

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Solution

The fourth proportional to 483,612.40, 725,418.60 and 128,662.30 is: 192,993.45

Step by Step Solution

  1. Step 1: Write the proportion equation
    483,612.40 : 725,418.60 = 128,662.30 : x
  2. Step 2: Convert to fraction form
    483,612.40/725,418.60 = 128,662.30/x
  3. Step 3: Cross multiply
    483,612.40x = 725,418.60 × 128,662.30
  4. Step 4: Simplify right side
    483,612.40x = 93,334,025,538.78
  5. Step 5: Solve for x
    x = 93,334,025,538.78/483,612.40
  6. Step 6: Final answer
    x = 192,993.45

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Similar ratio
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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.