Home / 679,891.40-938,383.35-389,697.43

Finding the Fourth Proportional to 679,891.40, 938,383.35 and 389,697.43

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Solution

The fourth proportional to 679,891.40, 938,383.35 and 389,697.43 is: 537,858.81

Step by Step Solution

  1. Step 1: Write the proportion equation
    679,891.40 : 938,383.35 = 389,697.43 : x
  2. Step 2: Convert to fraction form
    679,891.40/938,383.35 = 389,697.43/x
  3. Step 3: Cross multiply
    679,891.40x = 938,383.35 × 389,697.43
  4. Step 4: Simplify right side
    679,891.40x = 365,685,579,856.97
  5. Step 5: Solve for x
    x = 365,685,579,856.97/679,891.40
  6. Step 6: Final answer
    x = 537,858.81

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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.