Home / 420,860,986.20-631,291,479.30-413,686,532.70

Finding the Fourth Proportional to 420,860,986.20, 631,291,479.30 and 413,686,532.70

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Solution

The fourth proportional to 420,860,986.20, 631,291,479.30 and 413,686,532.70 is: 620,529,799.05

Step by Step Solution

  1. Step 1: Write the proportion equation
    420,860,986.20 : 631,291,479.30 = 413,686,532.70 : x
  2. Step 2: Convert to fraction form
    420,860,986.20/631,291,479.30 = 413,686,532.70/x
  3. Step 3: Cross multiply
    420,860,986.20x = 631,291,479.30 × 413,686,532.70
  4. Step 4: Simplify right side
    420,860,986.20x = 261,156,783,194,670,784
  5. Step 5: Solve for x
    x = 261,156,783,194,670,784/420,860,986.20
  6. Step 6: Final answer
    x = 620,529,799.05

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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.