Home / 685,890.64-1,028,617.84-641,112.40

Finding the Fourth Proportional to 685,890.64, 1,028,617.84 and 641,112.40

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Solution

The fourth proportional to 685,890.64, 1,028,617.84 and 641,112.40 is: 961,464.72

Step by Step Solution

  1. Step 1: Write the proportion equation
    685,890.64 : 1,028,617.84 = 641,112.40 : x
  2. Step 2: Convert to fraction form
    685,890.64/1,028,617.84 = 641,112.40/x
  3. Step 3: Cross multiply
    685,890.64x = 1,028,617.84 × 641,112.40
  4. Step 4: Simplify right side
    685,890.64x = 659,459,652,085.22
  5. Step 5: Solve for x
    x = 659,459,652,085.22/685,890.64
  6. Step 6: Final answer
    x = 961,464.72

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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.