Home / 639,311.20-958,931.73-386,523.83

Finding the Fourth Proportional to 639,311.20, 958,931.73 and 386,523.83

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Solution

The fourth proportional to 639,311.20, 958,931.73 and 386,523.83 is: 579,764.55

Step by Step Solution

  1. Step 1: Write the proportion equation
    639,311.20 : 958,931.73 = 386,523.83 : x
  2. Step 2: Convert to fraction form
    639,311.20/958,931.73 = 386,523.83/x
  3. Step 3: Cross multiply
    639,311.20x = 958,931.73 × 386,523.83
  4. Step 4: Simplify right side
    639,311.20x = 370,649,967,385.46
  5. Step 5: Solve for x
    x = 370,649,967,385.46/639,311.20
  6. Step 6: Final answer
    x = 579,764.55

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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.