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Finding the Fourth Proportional to 509,321.70, 764,328.15 and 331,395.30

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Solution

The fourth proportional to 509,321.70, 764,328.15 and 331,395.30 is: 497,317.82

Step by Step Solution

  1. Step 1: Write the proportion equation
    509,321.70 : 764,328.15 = 331,395.30 : x
  2. Step 2: Convert to fraction form
    509,321.70/764,328.15 = 331,395.30/x
  3. Step 3: Cross multiply
    509,321.70x = 764,328.15 × 331,395.30
  4. Step 4: Simplify right side
    509,321.70x = 253,294,756,567.70
  5. Step 5: Solve for x
    x = 253,294,756,567.70/509,321.70
  6. Step 6: Final answer
    x = 497,317.82

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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.