Home / 395,137,638.56-545,289,941.16-221,297,382.56

Finding the Fourth Proportional to 395,137,638.56, 545,289,941.16 and 221,297,382.56

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Solution

The fourth proportional to 395,137,638.56, 545,289,941.16 and 221,297,382.56 is: 305,390,387.90

Step by Step Solution

  1. Step 1: Write the proportion equation
    395,137,638.56 : 545,289,941.16 = 221,297,382.56 : x
  2. Step 2: Convert to fraction form
    395,137,638.56/545,289,941.16 = 221,297,382.56/x
  3. Step 3: Cross multiply
    395,137,638.56x = 545,289,941.16 × 221,297,382.56
  4. Step 4: Simplify right side
    395,137,638.56x = 120,671,236,715,004,400
  5. Step 5: Solve for x
    x = 120,671,236,715,004,400/395,137,638.56
  6. Step 6: Final answer
    x = 305,390,387.90

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Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.