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Finding the Fourth Proportional to 285,800.72, 394,403.40 and 158,495.12

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Solution

The fourth proportional to 285,800.72, 394,403.40 and 158,495.12 is: 218,722.38

Step by Step Solution

  1. Step 1: Write the proportion equation
    285,800.72 : 394,403.40 = 158,495.12 : x
  2. Step 2: Convert to fraction form
    285,800.72/394,403.40 = 158,495.12/x
  3. Step 3: Cross multiply
    285,800.72x = 394,403.40 × 158,495.12
  4. Step 4: Simplify right side
    285,800.72x = 62,511,014,211.41
  5. Step 5: Solve for x
    x = 62,511,014,211.41/285,800.72
  6. Step 6: Final answer
    x = 218,722.38

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1.5x scale

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.