Home / 645,040,971.24-890,130,900.96-380,808,081.60

Finding the Fourth Proportional to 645,040,971.24, 890,130,900.96 and 380,808,081.60

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Solution

The fourth proportional to 645,040,971.24, 890,130,900.96 and 380,808,081.60 is: 525,500,016.09

Step by Step Solution

  1. Step 1: Write the proportion equation
    645,040,971.24 : 890,130,900.96 = 380,808,081.60 : x
  2. Step 2: Convert to fraction form
    645,040,971.24/890,130,900.96 = 380,808,081.60/x
  3. Step 3: Cross multiply
    645,040,971.24x = 890,130,900.96 × 380,808,081.60
  4. Step 4: Simplify right side
    645,040,971.24x = 338,969,040,767,457,216
  5. Step 5: Solve for x
    x = 338,969,040,767,457,216/645,040,971.24
  6. Step 6: Final answer
    x = 525,500,016.09

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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.