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Finding the Fourth Proportional to 280,630.46, 420,683.25 and 103,089.80

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Solution

The fourth proportional to 280,630.46, 420,683.25 and 103,089.80 is: 154,538.29

Step by Step Solution

  1. Step 1: Write the proportion equation
    280,630.46 : 420,683.25 = 103,089.80 : x
  2. Step 2: Convert to fraction form
    280,630.46/420,683.25 = 103,089.80/x
  3. Step 3: Cross multiply
    280,630.46x = 420,683.25 × 103,089.80
  4. Step 4: Simplify right side
    280,630.46x = 43,368,152,105.85
  5. Step 5: Solve for x
    x = 43,368,152,105.85/280,630.46
  6. Step 6: Final answer
    x = 154,538.29

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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.