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Finding the Fourth Proportional to 280,872.55, 387,558.84 and 160,015.69

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Solution

The fourth proportional to 280,872.55, 387,558.84 and 160,015.69 is: 220,795.86

Step by Step Solution

  1. Step 1: Write the proportion equation
    280,872.55 : 387,558.84 = 160,015.69 : x
  2. Step 2: Convert to fraction form
    280,872.55/387,558.84 = 160,015.69/x
  3. Step 3: Cross multiply
    280,872.55x = 387,558.84 × 160,015.69
  4. Step 4: Simplify right side
    280,872.55x = 62,015,495,198.20
  5. Step 5: Solve for x
    x = 62,015,495,198.20/280,872.55
  6. Step 6: Final answer
    x = 220,795.86

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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.