Home / 285,864.72-394,486.38-156,804.90

Finding the Fourth Proportional to 285,864.72, 394,486.38 and 156,804.90

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Solution

The fourth proportional to 285,864.72, 394,486.38 and 156,804.90 is: 216,386.96

Step by Step Solution

  1. Step 1: Write the proportion equation
    285,864.72 : 394,486.38 = 156,804.90 : x
  2. Step 2: Convert to fraction form
    285,864.72/394,486.38 = 156,804.90/x
  3. Step 3: Cross multiply
    285,864.72x = 394,486.38 × 156,804.90
  4. Step 4: Simplify right side
    285,864.72x = 61,857,397,367.26
  5. Step 5: Solve for x
    x = 61,857,397,367.26/285,864.72
  6. Step 6: Final answer
    x = 216,386.96

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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.