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Finding the Fourth Proportional to 285,863.40, 394,515.72 and 158,580

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Solution

The fourth proportional to 285,863.40, 394,515.72 and 158,580 is: 218,853.84

Step by Step Solution

  1. Step 1: Write the proportion equation
    285,863.40 : 394,515.72 = 158,580 : x
  2. Step 2: Convert to fraction form
    285,863.40/394,515.72 = 158,580/x
  3. Step 3: Cross multiply
    285,863.40x = 394,515.72 × 158,580
  4. Step 4: Simplify right side
    285,863.40x = 62,562,302,877.60
  5. Step 5: Solve for x
    x = 62,562,302,877.60/285,863.40
  6. Step 6: Final answer
    x = 218,853.84

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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.