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Finding the Fourth Proportional to 280,611.26, 387,235.42 and 153,286.86

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Solution

The fourth proportional to 280,611.26, 387,235.42 and 153,286.86 is: 211,531.43

Step by Step Solution

  1. Step 1: Write the proportion equation
    280,611.26 : 387,235.42 = 153,286.86 : x
  2. Step 2: Convert to fraction form
    280,611.26/387,235.42 = 153,286.86/x
  3. Step 3: Cross multiply
    280,611.26x = 387,235.42 × 153,286.86
  4. Step 4: Simplify right side
    280,611.26x = 59,358,100,060.88
  5. Step 5: Solve for x
    x = 59,358,100,060.88/280,611.26
  6. Step 6: Final answer
    x = 211,531.43

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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.