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Finding the Fourth Proportional to 308,772.60, 426,124.96 and 172,803.76

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Solution

The fourth proportional to 308,772.60, 426,124.96 and 172,803.76 is: 238,479.69

Step by Step Solution

  1. Step 1: Write the proportion equation
    308,772.60 : 426,124.96 = 172,803.76 : x
  2. Step 2: Convert to fraction form
    308,772.60/426,124.96 = 172,803.76/x
  3. Step 3: Cross multiply
    308,772.60x = 426,124.96 × 172,803.76
  4. Step 4: Simplify right side
    308,772.60x = 73,635,995,317.85
  5. Step 5: Solve for x
    x = 73,635,995,317.85/308,772.60
  6. Step 6: Final answer
    x = 238,479.69

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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.