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Finding the Fourth Proportional to 308,818.58, 426,149.84 and 172,829.57

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Solution

The fourth proportional to 308,818.58, 426,149.84 and 172,829.57 is: 238,493.72

Step by Step Solution

  1. Step 1: Write the proportion equation
    308,818.58 : 426,149.84 = 172,829.57 : x
  2. Step 2: Convert to fraction form
    308,818.58/426,149.84 = 172,829.57/x
  3. Step 3: Cross multiply
    308,818.58x = 426,149.84 × 172,829.57
  4. Step 4: Simplify right side
    308,818.58x = 73,651,291,904.09
  5. Step 5: Solve for x
    x = 73,651,291,904.09/308,818.58
  6. Step 6: Final answer
    x = 238,493.72

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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.