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Finding the Fourth Proportional to 638,761.77, 881,480.75 and 352,308.51

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Solution

The fourth proportional to 638,761.77, 881,480.75 and 352,308.51 is: 486,179.95

Step by Step Solution

  1. Step 1: Write the proportion equation
    638,761.77 : 881,480.75 = 352,308.51 : x
  2. Step 2: Convert to fraction form
    638,761.77/881,480.75 = 352,308.51/x
  3. Step 3: Cross multiply
    638,761.77x = 881,480.75 × 352,308.51
  4. Step 4: Simplify right side
    638,761.77x = 310,553,167,864.64
  5. Step 5: Solve for x
    x = 310,553,167,864.64/638,761.77
  6. Step 6: Final answer
    x = 486,179.95

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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.