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Finding the Fourth Proportional to 697,197, 962,131.88 and 395,391

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Solution

The fourth proportional to 697,197, 962,131.88 and 395,391 is: 545,639.59

Step by Step Solution

  1. Step 1: Write the proportion equation
    697,197 : 962,131.88 = 395,391 : x
  2. Step 2: Convert to fraction form
    697,197/962,131.88 = 395,391/x
  3. Step 3: Cross multiply
    697,197x = 962,131.88 × 395,391
  4. Step 4: Simplify right side
    697,197x = 380,418,284,188.13
  5. Step 5: Solve for x
    x = 380,418,284,188.13/697,197
  6. Step 6: Final answer
    x = 545,639.59

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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.