Home / 643,919.57-888,564.54-357,417.09

Finding the Fourth Proportional to 643,919.57, 888,564.54 and 357,417.09

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Solution

The fourth proportional to 643,919.57, 888,564.54 and 357,417.09 is: 493,210.91

Step by Step Solution

  1. Step 1: Write the proportion equation
    643,919.57 : 888,564.54 = 357,417.09 : x
  2. Step 2: Convert to fraction form
    643,919.57/888,564.54 = 357,417.09/x
  3. Step 3: Cross multiply
    643,919.57x = 888,564.54 × 357,417.09
  4. Step 4: Simplify right side
    643,919.57x = 317,588,152,163.99
  5. Step 5: Solve for x
    x = 317,588,152,163.99/643,919.57
  6. Step 6: Final answer
    x = 493,210.91

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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.