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Finding the Fourth Proportional to 652,892,030.20, 978,062,586.90 and 393,336,245.80

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Solution

The fourth proportional to 652,892,030.20, 978,062,586.90 and 393,336,245.80 is: 589,235,965.97

Step by Step Solution

  1. Step 1: Write the proportion equation
    652,892,030.20 : 978,062,586.90 = 393,336,245.80 : x
  2. Step 2: Convert to fraction form
    652,892,030.20/978,062,586.90 = 393,336,245.80/x
  3. Step 3: Cross multiply
    652,892,030.20x = 978,062,586.90 × 393,336,245.80
  4. Step 4: Simplify right side
    652,892,030.20x = 384,707,466,088,682,240
  5. Step 5: Solve for x
    x = 384,707,466,088,682,240/652,892,030.20
  6. Step 6: Final answer
    x = 589,235,965.97

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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.