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Finding the Fourth Proportional to 695,623.14, 959,909.84 and 389,647.77

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Solution

The fourth proportional to 695,623.14, 959,909.84 and 389,647.77 is: 537,685.86

Step by Step Solution

  1. Step 1: Write the proportion equation
    695,623.14 : 959,909.84 = 389,647.77 : x
  2. Step 2: Convert to fraction form
    695,623.14/959,909.84 = 389,647.77/x
  3. Step 3: Cross multiply
    695,623.14x = 959,909.84 × 389,647.77
  4. Step 4: Simplify right side
    695,623.14x = 374,026,724,470.34
  5. Step 5: Solve for x
    x = 374,026,724,470.34/695,623.14
  6. Step 6: Final answer
    x = 537,685.86

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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.