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Finding the Fourth Proportional to 720,738.99, 994,588.56 and 394,045.74

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Solution

The fourth proportional to 720,738.99, 994,588.56 and 394,045.74 is: 543,766.04

Step by Step Solution

  1. Step 1: Write the proportion equation
    720,738.99 : 994,588.56 = 394,045.74 : x
  2. Step 2: Convert to fraction form
    720,738.99/994,588.56 = 394,045.74/x
  3. Step 3: Cross multiply
    720,738.99x = 994,588.56 × 394,045.74
  4. Step 4: Simplify right side
    720,738.99x = 391,913,385,120.73
  5. Step 5: Solve for x
    x = 391,913,385,120.73/720,738.99
  6. Step 6: Final answer
    x = 543,766.04

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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.