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Finding the Fourth Proportional to 667,391.82, 920,995.95 and 361,461.15

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Solution

The fourth proportional to 667,391.82, 920,995.95 and 361,461.15 is: 498,813.81

Step by Step Solution

  1. Step 1: Write the proportion equation
    667,391.82 : 920,995.95 = 361,461.15 : x
  2. Step 2: Convert to fraction form
    667,391.82/920,995.95 = 361,461.15/x
  3. Step 3: Cross multiply
    667,391.82x = 920,995.95 × 361,461.15
  4. Step 4: Simplify right side
    667,391.82x = 332,904,255,232.34
  5. Step 5: Solve for x
    x = 332,904,255,232.34/667,391.82
  6. Step 6: Final answer
    x = 498,813.81

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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.