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Finding the Fourth Proportional to 555,383.88, 766,428.66 and 300,734.28

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Solution

The fourth proportional to 555,383.88, 766,428.66 and 300,734.28 is: 415,012.71

Step by Step Solution

  1. Step 1: Write the proportion equation
    555,383.88 : 766,428.66 = 300,734.28 : x
  2. Step 2: Convert to fraction form
    555,383.88/766,428.66 = 300,734.28/x
  3. Step 3: Cross multiply
    555,383.88x = 766,428.66 × 300,734.28
  4. Step 4: Simplify right side
    555,383.88x = 230,491,371,236.47
  5. Step 5: Solve for x
    x = 230,491,371,236.47/555,383.88
  6. Step 6: Final answer
    x = 415,012.71

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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.