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Finding the Fourth Proportional to 668,761.72, 922,891.30 and 382,288.12

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Solution

The fourth proportional to 668,761.72, 922,891.30 and 382,288.12 is: 527,557.68

Step by Step Solution

  1. Step 1: Write the proportion equation
    668,761.72 : 922,891.30 = 382,288.12 : x
  2. Step 2: Convert to fraction form
    668,761.72/922,891.30 = 382,288.12/x
  3. Step 3: Cross multiply
    668,761.72x = 922,891.30 × 382,288.12
  4. Step 4: Simplify right side
    668,761.72x = 352,810,380,041.36
  5. Step 5: Solve for x
    x = 352,810,380,041.36/668,761.72
  6. Step 6: Final answer
    x = 527,557.68

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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.