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Finding the Fourth Proportional to 308,486.95, 425,733.69 and 172,533.55

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Solution

The fourth proportional to 308,486.95, 425,733.69 and 172,533.55 is: 238,108.44

Step by Step Solution

  1. Step 1: Write the proportion equation
    308,486.95 : 425,733.69 = 172,533.55 : x
  2. Step 2: Convert to fraction form
    308,486.95/425,733.69 = 172,533.55/x
  3. Step 3: Cross multiply
    308,486.95x = 425,733.69 × 172,533.55
  4. Step 4: Simplify right side
    308,486.95x = 73,453,344,890.30
  5. Step 5: Solve for x
    x = 73,453,344,890.30/308,486.95
  6. Step 6: Final answer
    x = 238,108.44

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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.