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Finding the Fourth Proportional to 621,049.20, 856,951.80 and 349,066.58

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Solution

The fourth proportional to 621,049.20, 856,951.80 and 349,066.58 is: 481,657.87

Step by Step Solution

  1. Step 1: Write the proportion equation
    621,049.20 : 856,951.80 = 349,066.58 : x
  2. Step 2: Convert to fraction form
    621,049.20/856,951.80 = 349,066.58/x
  3. Step 3: Cross multiply
    621,049.20x = 856,951.80 × 349,066.58
  4. Step 4: Simplify right side
    621,049.20x = 299,133,234,050.84
  5. Step 5: Solve for x
    x = 299,133,234,050.84/621,049.20
  6. Step 6: Final answer
    x = 481,657.87

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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.