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Finding the Fourth Proportional to 265,325.20, 397,987.80 and 87,859.60

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Solution

The fourth proportional to 265,325.20, 397,987.80 and 87,859.60 is: 131,789.40

Step by Step Solution

  1. Step 1: Write the proportion equation
    265,325.20 : 397,987.80 = 87,859.60 : x
  2. Step 2: Convert to fraction form
    265,325.20/397,987.80 = 87,859.60/x
  3. Step 3: Cross multiply
    265,325.20x = 397,987.80 × 87,859.60
  4. Step 4: Simplify right side
    265,325.20x = 34,967,048,912.88
  5. Step 5: Solve for x
    x = 34,967,048,912.88/265,325.20
  6. Step 6: Final answer
    x = 131,789.40

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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.