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Finding the Fourth Proportional to 667,155.99, 920,675.70 and 361,232.59

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Solution

The fourth proportional to 667,155.99, 920,675.70 and 361,232.59 is: 498,501.21

Step by Step Solution

  1. Step 1: Write the proportion equation
    667,155.99 : 920,675.70 = 361,232.59 : x
  2. Step 2: Convert to fraction form
    667,155.99/920,675.70 = 361,232.59/x
  3. Step 3: Cross multiply
    667,155.99x = 920,675.70 × 361,232.59
  4. Step 4: Simplify right side
    667,155.99x = 332,578,065,359.37
  5. Step 5: Solve for x
    x = 332,578,065,359.37/667,155.99
  6. Step 6: Final answer
    x = 498,501.21

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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.