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Finding the Fourth Proportional to 641,863.76, 885,799.66 and 355,383.84

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Solution

The fourth proportional to 641,863.76, 885,799.66 and 355,383.84 is: 490,445.02

Step by Step Solution

  1. Step 1: Write the proportion equation
    641,863.76 : 885,799.66 = 355,383.84 : x
  2. Step 2: Convert to fraction form
    641,863.76/885,799.66 = 355,383.84/x
  3. Step 3: Cross multiply
    641,863.76x = 885,799.66 × 355,383.84
  4. Step 4: Simplify right side
    641,863.76x = 314,798,884,641.49
  5. Step 5: Solve for x
    x = 314,798,884,641.49/641,863.76
  6. Step 6: Final answer
    x = 490,445.02

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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.