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Finding the Fourth Proportional to 280,611.69, 387,229.69 and 153,262.68

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Solution

The fourth proportional to 280,611.69, 387,229.69 and 153,262.68 is: 211,494.61

Step by Step Solution

  1. Step 1: Write the proportion equation
    280,611.69 : 387,229.69 = 153,262.68 : x
  2. Step 2: Convert to fraction form
    280,611.69/387,229.69 = 153,262.68/x
  3. Step 3: Cross multiply
    280,611.69x = 387,229.69 × 153,262.68
  4. Step 4: Simplify right side
    280,611.69x = 59,347,860,064.97
  5. Step 5: Solve for x
    x = 59,347,860,064.97/280,611.69
  6. Step 6: Final answer
    x = 211,494.61

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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.