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Finding the Fourth Proportional to 648,765.05, 971,791.43 and 521,719.38

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Solution

The fourth proportional to 648,765.05, 971,791.43 and 521,719.38 is: 781,488.50

Step by Step Solution

  1. Step 1: Write the proportion equation
    648,765.05 : 971,791.43 = 521,719.38 : x
  2. Step 2: Convert to fraction form
    648,765.05/971,791.43 = 521,719.38/x
  3. Step 3: Cross multiply
    648,765.05x = 971,791.43 × 521,719.38
  4. Step 4: Simplify right side
    648,765.05x = 507,002,419,740.32
  5. Step 5: Solve for x
    x = 507,002,419,740.32/648,765.05
  6. Step 6: Final answer
    x = 781,488.50

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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.