Home / 621,121,489.20-930,890,977.20-330,128,017.20

Finding the Fourth Proportional to 621,121,489.20, 930,890,977.20 and 330,128,017.20

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Solution

The fourth proportional to 621,121,489.20, 930,890,977.20 and 330,128,017.20 is: 494,771,470.44

Step by Step Solution

  1. Step 1: Write the proportion equation
    621,121,489.20 : 930,890,977.20 = 330,128,017.20 : x
  2. Step 2: Convert to fraction form
    621,121,489.20/930,890,977.20 = 330,128,017.20/x
  3. Step 3: Cross multiply
    621,121,489.20x = 930,890,977.20 × 330,128,017.20
  4. Step 4: Simplify right side
    621,121,489.20x = 307,313,192,532,406,400
  5. Step 5: Solve for x
    x = 307,313,192,532,406,400/621,121,489.20
  6. Step 6: Final answer
    x = 494,771,470.44

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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.