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Finding the Fourth Proportional to 696,686.40, 961,502.40 and 394,848

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Solution

The fourth proportional to 696,686.40, 961,502.40 and 394,848 is: 544,932.84

Step by Step Solution

  1. Step 1: Write the proportion equation
    696,686.40 : 961,502.40 = 394,848 : x
  2. Step 2: Convert to fraction form
    696,686.40/961,502.40 = 394,848/x
  3. Step 3: Cross multiply
    696,686.40x = 961,502.40 × 394,848
  4. Step 4: Simplify right side
    696,686.40x = 379,647,299,635.20
  5. Step 5: Solve for x
    x = 379,647,299,635.20/696,686.40
  6. Step 6: Final answer
    x = 544,932.84

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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.