Home / 718,799.40-991,930.86-396,540.36

Finding the Fourth Proportional to 718,799.40, 991,930.86 and 396,540.36

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Solution

The fourth proportional to 718,799.40, 991,930.86 and 396,540.36 is: 547,218.90

Step by Step Solution

  1. Step 1: Write the proportion equation
    718,799.40 : 991,930.86 = 396,540.36 : x
  2. Step 2: Convert to fraction form
    718,799.40/991,930.86 = 396,540.36/x
  3. Step 3: Cross multiply
    718,799.40x = 991,930.86 × 396,540.36
  4. Step 4: Simplify right side
    718,799.40x = 393,340,620,319.51
  5. Step 5: Solve for x
    x = 393,340,620,319.51/718,799.40
  6. Step 6: Final answer
    x = 547,218.90

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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.