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Finding the Fourth Proportional to 531,091.21, 732,896.62 and 289,375.77

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Solution

The fourth proportional to 531,091.21, 732,896.62 and 289,375.77 is: 399,333.52

Step by Step Solution

  1. Step 1: Write the proportion equation
    531,091.21 : 732,896.62 = 289,375.77 : x
  2. Step 2: Convert to fraction form
    531,091.21/732,896.62 = 289,375.77/x
  3. Step 3: Cross multiply
    531,091.21x = 732,896.62 × 289,375.77
  4. Step 4: Simplify right side
    531,091.21x = 212,082,523,742.90
  5. Step 5: Solve for x
    x = 212,082,523,742.90/531,091.21
  6. Step 6: Final answer
    x = 399,333.52

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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.