Home / 639,390.80-882,296.40-352,892.36

Finding the Fourth Proportional to 639,390.80, 882,296.40 and 352,892.36

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Solution

The fourth proportional to 639,390.80, 882,296.40 and 352,892.36 is: 486,956.74

Step by Step Solution

  1. Step 1: Write the proportion equation
    639,390.80 : 882,296.40 = 352,892.36 : x
  2. Step 2: Convert to fraction form
    639,390.80/882,296.40 = 352,892.36/x
  3. Step 3: Cross multiply
    639,390.80x = 882,296.40 × 352,892.36
  4. Step 4: Simplify right side
    639,390.80x = 311,355,658,815.50
  5. Step 5: Solve for x
    x = 311,355,658,815.50/639,390.80
  6. Step 6: Final answer
    x = 486,956.74

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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.