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Finding the Fourth Proportional to 719,800,740.89, 993,324,780.36 and 389,775,879.89

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Solution

The fourth proportional to 719,800,740.89, 993,324,780.36 and 389,775,879.89 is: 537,890,583.17

Step by Step Solution

  1. Step 1: Write the proportion equation
    719,800,740.89 : 993,324,780.36 = 389,775,879.89 : x
  2. Step 2: Convert to fraction form
    719,800,740.89/993,324,780.36 = 389,775,879.89/x
  3. Step 3: Cross multiply
    719,800,740.89x = 993,324,780.36 × 389,775,879.89
  4. Step 4: Simplify right side
    719,800,740.89x = 387,174,040,281,360,000
  5. Step 5: Solve for x
    x = 387,174,040,281,360,000/719,800,740.89
  6. Step 6: Final answer
    x = 537,890,583.17

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1.5x scale

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.