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Finding the Fourth Proportional to 285,961.79, 394,674.57 and 158,678.39

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Solution

The fourth proportional to 285,961.79, 394,674.57 and 158,678.39 is: 219,002.42

Step by Step Solution

  1. Step 1: Write the proportion equation
    285,961.79 : 394,674.57 = 158,678.39 : x
  2. Step 2: Convert to fraction form
    285,961.79/394,674.57 = 158,678.39/x
  3. Step 3: Cross multiply
    285,961.79x = 394,674.57 × 158,678.39
  4. Step 4: Simplify right side
    285,961.79x = 62,626,323,368.17
  5. Step 5: Solve for x
    x = 62,626,323,368.17/285,961.79
  6. Step 6: Final answer
    x = 219,002.42

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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.