Home / 619,829.20-855,004.04-390,296.48

Finding the Fourth Proportional to 619,829.20, 855,004.04 and 390,296.48

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Solution

The fourth proportional to 619,829.20, 855,004.04 and 390,296.48 is: 538,382.29

Step by Step Solution

  1. Step 1: Write the proportion equation
    619,829.20 : 855,004.04 = 390,296.48 : x
  2. Step 2: Convert to fraction form
    619,829.20/855,004.04 = 390,296.48/x
  3. Step 3: Cross multiply
    619,829.20x = 855,004.04 × 390,296.48
  4. Step 4: Simplify right side
    619,829.20x = 333,705,067,197.78
  5. Step 5: Solve for x
    x = 333,705,067,197.78/619,829.20
  6. Step 6: Final answer
    x = 538,382.29

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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.