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Finding the Fourth Proportional to 285,762.60, 394,351.74 and 158,434.92

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Solution

The fourth proportional to 285,762.60, 394,351.74 and 158,434.92 is: 218,639.83

Step by Step Solution

  1. Step 1: Write the proportion equation
    285,762.60 : 394,351.74 = 158,434.92 : x
  2. Step 2: Convert to fraction form
    285,762.60/394,351.74 = 158,434.92/x
  3. Step 3: Cross multiply
    285,762.60x = 394,351.74 × 158,434.92
  4. Step 4: Simplify right side
    285,762.60x = 62,479,086,378.76
  5. Step 5: Solve for x
    x = 62,479,086,378.76/285,762.60
  6. Step 6: Final answer
    x = 218,639.83

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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.