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Finding the Fourth Proportional to 722,090.14, 996,492.45 and 399,830.02

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Solution

The fourth proportional to 722,090.14, 996,492.45 and 399,830.02 is: 551,769.89

Step by Step Solution

  1. Step 1: Write the proportion equation
    722,090.14 : 996,492.45 = 399,830.02 : x
  2. Step 2: Convert to fraction form
    722,090.14/996,492.45 = 399,830.02/x
  3. Step 3: Cross multiply
    722,090.14x = 996,492.45 × 399,830.02
  4. Step 4: Simplify right side
    722,090.14x = 398,427,596,213.35
  5. Step 5: Solve for x
    x = 398,427,596,213.35/722,090.14
  6. Step 6: Final answer
    x = 551,769.89

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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.