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Finding the Fourth Proportional to 280,854.96, 421,240.92 and 103,320.44

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Solution

The fourth proportional to 280,854.96, 421,240.92 and 103,320.44 is: 154,965.39

Step by Step Solution

  1. Step 1: Write the proportion equation
    280,854.96 : 421,240.92 = 103,320.44 : x
  2. Step 2: Convert to fraction form
    280,854.96/421,240.92 = 103,320.44/x
  3. Step 3: Cross multiply
    280,854.96x = 421,240.92 × 103,320.44
  4. Step 4: Simplify right side
    280,854.96x = 43,522,797,200.40
  5. Step 5: Solve for x
    x = 43,522,797,200.40/280,854.96
  6. Step 6: Final answer
    x = 154,965.39

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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.