Home / 641,720.90-961,544.55-404,639.30

Finding the Fourth Proportional to 641,720.90, 961,544.55 and 404,639.30

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Solution

The fourth proportional to 641,720.90, 961,544.55 and 404,639.30 is: 606,305.19

Step by Step Solution

  1. Step 1: Write the proportion equation
    641,720.90 : 961,544.55 = 404,639.30 : x
  2. Step 2: Convert to fraction form
    641,720.90/961,544.55 = 404,639.30/x
  3. Step 3: Cross multiply
    641,720.90x = 961,544.55 × 404,639.30
  4. Step 4: Simplify right side
    641,720.90x = 389,078,713,630.82
  5. Step 5: Solve for x
    x = 389,078,713,630.82/641,720.90
  6. Step 6: Final answer
    x = 606,305.19

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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.