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Finding the Fourth Proportional to 720,722.96, 994,597.56 and 394,037.12

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Solution

The fourth proportional to 720,722.96, 994,597.56 and 394,037.12 is: 543,771.16

Step by Step Solution

  1. Step 1: Write the proportion equation
    720,722.96 : 994,597.56 = 394,037.12 : x
  2. Step 2: Convert to fraction form
    720,722.96/994,597.56 = 394,037.12/x
  3. Step 3: Cross multiply
    720,722.96x = 994,597.56 × 394,037.12
  4. Step 4: Simplify right side
    720,722.96x = 391,908,358,101.43
  5. Step 5: Solve for x
    x = 391,908,358,101.43/720,722.96
  6. Step 6: Final answer
    x = 543,771.16

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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.