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Finding the Fourth Proportional to 667,710.96, 921,442.05 and 361,790.66

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Solution

The fourth proportional to 667,710.96, 921,442.05 and 361,790.66 is: 499,271.61

Step by Step Solution

  1. Step 1: Write the proportion equation
    667,710.96 : 921,442.05 = 361,790.66 : x
  2. Step 2: Convert to fraction form
    667,710.96/921,442.05 = 361,790.66/x
  3. Step 3: Cross multiply
    667,710.96x = 921,442.05 × 361,790.66
  4. Step 4: Simplify right side
    667,710.96x = 333,369,122,814.04
  5. Step 5: Solve for x
    x = 333,369,122,814.04/667,710.96
  6. Step 6: Final answer
    x = 499,271.61

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These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.