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Finding the Fourth Proportional to 664,178.64, 996,798.78 and 344,421.42

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Solution

The fourth proportional to 664,178.64, 996,798.78 and 344,421.42 is: 516,907.40

Step by Step Solution

  1. Step 1: Write the proportion equation
    664,178.64 : 996,798.78 = 344,421.42 : x
  2. Step 2: Convert to fraction form
    664,178.64/996,798.78 = 344,421.42/x
  3. Step 3: Cross multiply
    664,178.64x = 996,798.78 × 344,421.42
  4. Step 4: Simplify right side
    664,178.64x = 343,318,851,261.87
  5. Step 5: Solve for x
    x = 343,318,851,261.87/664,178.64
  6. Step 6: Final answer
    x = 516,907.40

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Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.