Home / 285,380.80-428,099.52-105,513.34

Finding the Fourth Proportional to 285,380.80, 428,099.52 and 105,513.34

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Solution

The fourth proportional to 285,380.80, 428,099.52 and 105,513.34 is: 158,280.48

Step by Step Solution

  1. Step 1: Write the proportion equation
    285,380.80 : 428,099.52 = 105,513.34 : x
  2. Step 2: Convert to fraction form
    285,380.80/428,099.52 = 105,513.34/x
  3. Step 3: Cross multiply
    285,380.80x = 428,099.52 × 105,513.34
  4. Step 4: Simplify right side
    285,380.80x = 45,170,210,207.60
  5. Step 5: Solve for x
    x = 45,170,210,207.60/285,380.80
  6. Step 6: Final answer
    x = 158,280.48

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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.