Home / 639,824.80-960,068.40-261,023.20

Finding the Fourth Proportional to 639,824.80, 960,068.40 and 261,023.20

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Solution

The fourth proportional to 639,824.80, 960,068.40 and 261,023.20 is: 391,669.92

Step by Step Solution

  1. Step 1: Write the proportion equation
    639,824.80 : 960,068.40 = 261,023.20 : x
  2. Step 2: Convert to fraction form
    639,824.80/960,068.40 = 261,023.20/x
  3. Step 3: Cross multiply
    639,824.80x = 960,068.40 × 261,023.20
  4. Step 4: Simplify right side
    639,824.80x = 250,600,125,986.88
  5. Step 5: Solve for x
    x = 250,600,125,986.88/639,824.80
  6. Step 6: Final answer
    x = 391,669.92

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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.