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Finding the Fourth Proportional to 280,357.70, 386,880.11 and 159,487.61

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Solution

The fourth proportional to 280,357.70, 386,880.11 and 159,487.61 is: 220,085.21

Step by Step Solution

  1. Step 1: Write the proportion equation
    280,357.70 : 386,880.11 = 159,487.61 : x
  2. Step 2: Convert to fraction form
    280,357.70/386,880.11 = 159,487.61/x
  3. Step 3: Cross multiply
    280,357.70x = 386,880.11 × 159,487.61
  4. Step 4: Simplify right side
    280,357.70x = 61,702,584,100.44
  5. Step 5: Solve for x
    x = 61,702,584,100.44/280,357.70
  6. Step 6: Final answer
    x = 220,085.21

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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.