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Finding the Fourth Proportional to 722,357.12, 996,861.66 and 400,072.70

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Solution

The fourth proportional to 722,357.12, 996,861.66 and 400,072.70 is: 552,105.22

Step by Step Solution

  1. Step 1: Write the proportion equation
    722,357.12 : 996,861.66 = 400,072.70 : x
  2. Step 2: Convert to fraction form
    722,357.12/996,861.66 = 400,072.70/x
  3. Step 3: Cross multiply
    722,357.12x = 996,861.66 × 400,072.70
  4. Step 4: Simplify right side
    722,357.12x = 398,817,135,842.68
  5. Step 5: Solve for x
    x = 398,817,135,842.68/722,357.12
  6. Step 6: Final answer
    x = 552,105.22

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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.