Home / 641,865.20-885,801.64-355,385.28

Finding the Fourth Proportional to 641,865.20, 885,801.64 and 355,385.28

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Solution

The fourth proportional to 641,865.20, 885,801.64 and 355,385.28 is: 490,447.00

Step by Step Solution

  1. Step 1: Write the proportion equation
    641,865.20 : 885,801.64 = 355,385.28 : x
  2. Step 2: Convert to fraction form
    641,865.20/885,801.64 = 355,385.28/x
  3. Step 3: Cross multiply
    641,865.20x = 885,801.64 × 355,385.28
  4. Step 4: Simplify right side
    641,865.20x = 314,800,863,855.86
  5. Step 5: Solve for x
    x = 314,800,863,855.86/641,865.20
  6. Step 6: Final answer
    x = 490,447.00

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1.5x scale

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.