Home / 641,863.32-885,799.05-355,383.40

Finding the Fourth Proportional to 641,863.32, 885,799.05 and 355,383.40

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Solution

The fourth proportional to 641,863.32, 885,799.05 and 355,383.40 is: 490,444.41

Step by Step Solution

  1. Step 1: Write the proportion equation
    641,863.32 : 885,799.05 = 355,383.40 : x
  2. Step 2: Convert to fraction form
    641,863.32/885,799.05 = 355,383.40/x
  3. Step 3: Cross multiply
    641,863.32x = 885,799.05 × 355,383.40
  4. Step 4: Simplify right side
    641,863.32x = 314,798,278,105.77
  5. Step 5: Solve for x
    x = 314,798,278,105.77/641,863.32
  6. Step 6: Final answer
    x = 490,444.41

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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.