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Finding the Fourth Proportional to 664,968.73, 917,657.87 and 378,488.81

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Solution

The fourth proportional to 664,968.73, 917,657.87 and 378,488.81 is: 522,315.14

Step by Step Solution

  1. Step 1: Write the proportion equation
    664,968.73 : 917,657.87 = 378,488.81 : x
  2. Step 2: Convert to fraction form
    664,968.73/917,657.87 = 378,488.81/x
  3. Step 3: Cross multiply
    664,968.73x = 917,657.87 × 378,488.81
  4. Step 4: Simplify right side
    664,968.73x = 347,323,237,734.14
  5. Step 5: Solve for x
    x = 347,323,237,734.14/664,968.73
  6. Step 6: Final answer
    x = 522,315.14

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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.