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Finding the Fourth Proportional to 285,699.89, 394,239.34 and 158,364.65

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Solution

The fourth proportional to 285,699.89, 394,239.34 and 158,364.65 is: 218,528.52

Step by Step Solution

  1. Step 1: Write the proportion equation
    285,699.89 : 394,239.34 = 158,364.65 : x
  2. Step 2: Convert to fraction form
    285,699.89/394,239.34 = 158,364.65/x
  3. Step 3: Cross multiply
    285,699.89x = 394,239.34 × 158,364.65
  4. Step 4: Simplify right side
    285,699.89x = 62,433,575,095.33
  5. Step 5: Solve for x
    x = 62,433,575,095.33/285,699.89
  6. Step 6: Final answer
    x = 218,528.52

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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.