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Finding the Fourth Proportional to 722,090.64, 996,493.14 and 399,830.52

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Solution

The fourth proportional to 722,090.64, 996,493.14 and 399,830.52 is: 551,770.58

Step by Step Solution

  1. Step 1: Write the proportion equation
    722,090.64 : 996,493.14 = 399,830.52 : x
  2. Step 2: Convert to fraction form
    722,090.64/996,493.14 = 399,830.52/x
  3. Step 3: Cross multiply
    722,090.64x = 996,493.14 × 399,830.52
  4. Step 4: Simplify right side
    722,090.64x = 398,428,370,342.63
  5. Step 5: Solve for x
    x = 398,428,370,342.63/722,090.64
  6. Step 6: Final answer
    x = 551,770.58

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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.