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Finding the Fourth Proportional to 308,719.46, 426,055.74 and 172,767.04

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Solution

The fourth proportional to 308,719.46, 426,055.74 and 172,767.04 is: 238,431.32

Step by Step Solution

  1. Step 1: Write the proportion equation
    308,719.46 : 426,055.74 = 172,767.04 : x
  2. Step 2: Convert to fraction form
    308,719.46/426,055.74 = 172,767.04/x
  3. Step 3: Cross multiply
    308,719.46x = 426,055.74 × 172,767.04
  4. Step 4: Simplify right side
    308,719.46x = 73,608,389,074.81
  5. Step 5: Solve for x
    x = 73,608,389,074.81/308,719.46
  6. Step 6: Final answer
    x = 238,431.32

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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.