Home / 639,822.80-960,065.40-261,021.20

Finding the Fourth Proportional to 639,822.80, 960,065.40 and 261,021.20

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Solution

The fourth proportional to 639,822.80, 960,065.40 and 261,021.20 is: 391,666.92

Step by Step Solution

  1. Step 1: Write the proportion equation
    639,822.80 : 960,065.40 = 261,021.20 : x
  2. Step 2: Convert to fraction form
    639,822.80/960,065.40 = 261,021.20/x
  3. Step 3: Cross multiply
    639,822.80x = 960,065.40 × 261,021.20
  4. Step 4: Simplify right side
    639,822.80x = 250,597,422,786.48
  5. Step 5: Solve for x
    x = 250,597,422,786.48/639,822.80
  6. Step 6: Final answer
    x = 391,666.92

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.