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Finding the Fourth Proportional to 520,080.70, 780,121.05 and 253,704.10

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Solution

The fourth proportional to 520,080.70, 780,121.05 and 253,704.10 is: 380,556.15

Step by Step Solution

  1. Step 1: Write the proportion equation
    520,080.70 : 780,121.05 = 253,704.10 : x
  2. Step 2: Convert to fraction form
    520,080.70/780,121.05 = 253,704.10/x
  3. Step 3: Cross multiply
    520,080.70x = 780,121.05 × 253,704.10
  4. Step 4: Simplify right side
    520,080.70x = 197,919,908,881.31
  5. Step 5: Solve for x
    x = 197,919,908,881.31/520,080.70
  6. Step 6: Final answer
    x = 380,556.15

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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.