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Finding the Fourth Proportional to 665,073.76, 917,646.96 and 378,571.36

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Solution

The fourth proportional to 665,073.76, 917,646.96 and 378,571.36 is: 522,340.35

Step by Step Solution

  1. Step 1: Write the proportion equation
    665,073.76 : 917,646.96 = 378,571.36 : x
  2. Step 2: Convert to fraction form
    665,073.76/917,646.96 = 378,571.36/x
  3. Step 3: Cross multiply
    665,073.76x = 917,646.96 × 378,571.36
  4. Step 4: Simplify right side
    665,073.76x = 347,394,857,647.07
  5. Step 5: Solve for x
    x = 347,394,857,647.07/665,073.76
  6. Step 6: Final answer
    x = 522,340.35

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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.