Home / 645,040,861.70-890,130,749.85-380,807,971.83

Finding the Fourth Proportional to 645,040,861.70, 890,130,749.85 and 380,807,971.83

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Solution

The fourth proportional to 645,040,861.70, 890,130,749.85 and 380,807,971.83 is: 525,499,864.65

Step by Step Solution

  1. Step 1: Write the proportion equation
    645,040,861.70 : 890,130,749.85 = 380,807,971.83 : x
  2. Step 2: Convert to fraction form
    645,040,861.70/890,130,749.85 = 380,807,971.83/x
  3. Step 3: Cross multiply
    645,040,861.70x = 890,130,749.85 × 380,807,971.83
  4. Step 4: Simplify right side
    645,040,861.70x = 338,968,885,513,895,552
  5. Step 5: Solve for x
    x = 338,968,885,513,895,552/645,040,861.70
  6. Step 6: Final answer
    x = 525,499,864.65

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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.