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Finding the Fourth Proportional to 722,090.19, 996,515.61 and 399,800.30

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Solution

The fourth proportional to 722,090.19, 996,515.61 and 399,800.30 is: 551,741.65

Step by Step Solution

  1. Step 1: Write the proportion equation
    722,090.19 : 996,515.61 = 399,800.30 : x
  2. Step 2: Convert to fraction form
    722,090.19/996,515.61 = 399,800.30/x
  3. Step 3: Cross multiply
    722,090.19x = 996,515.61 × 399,800.30
  4. Step 4: Simplify right side
    722,090.19x = 398,407,234,850.11
  5. Step 5: Solve for x
    x = 398,407,234,850.11/722,090.19
  6. Step 6: Final answer
    x = 551,741.65

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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.