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Finding the Fourth Proportional to 280,990.41, 421,374.67 and 112,479.33

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Solution

The fourth proportional to 280,990.41, 421,374.67 and 112,479.33 is: 168,674.58

Step by Step Solution

  1. Step 1: Write the proportion equation
    280,990.41 : 421,374.67 = 112,479.33 : x
  2. Step 2: Convert to fraction form
    280,990.41/421,374.67 = 112,479.33/x
  3. Step 3: Cross multiply
    280,990.41x = 421,374.67 × 112,479.33
  4. Step 4: Simplify right side
    280,990.41x = 47,395,940,560.57
  5. Step 5: Solve for x
    x = 47,395,940,560.57/280,990.41
  6. Step 6: Final answer
    x = 168,674.58

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.