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Finding the Fourth Proportional to 308,805.70, 426,054.74 and 172,818.04

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Solution

The fourth proportional to 308,805.70, 426,054.74 and 172,818.04 is: 238,434.54

Step by Step Solution

  1. Step 1: Write the proportion equation
    308,805.70 : 426,054.74 = 172,818.04 : x
  2. Step 2: Convert to fraction form
    308,805.70/426,054.74 = 172,818.04/x
  3. Step 3: Cross multiply
    308,805.70x = 426,054.74 × 172,818.04
  4. Step 4: Simplify right side
    308,805.70x = 73,629,945,099.51
  5. Step 5: Solve for x
    x = 73,629,945,099.51/308,805.70
  6. Step 6: Final answer
    x = 238,434.54

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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.