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Finding the Fourth Proportional to 667,390.14, 920,999.52 and 361,467.18

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Solution

The fourth proportional to 667,390.14, 920,999.52 and 361,467.18 is: 498,825.32

Step by Step Solution

  1. Step 1: Write the proportion equation
    667,390.14 : 920,999.52 = 361,467.18 : x
  2. Step 2: Convert to fraction form
    667,390.14/920,999.52 = 361,467.18/x
  3. Step 3: Cross multiply
    667,390.14x = 920,999.52 × 361,467.18
  4. Step 4: Simplify right side
    667,390.14x = 332,911,099,275.75
  5. Step 5: Solve for x
    x = 332,911,099,275.75/667,390.14
  6. Step 6: Final answer
    x = 498,825.32

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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.