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Finding the Fourth Proportional to 308,794.72, 426,039.61 and 172,807.06

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Solution

The fourth proportional to 308,794.72, 426,039.61 and 172,807.06 is: 238,419.40

Step by Step Solution

  1. Step 1: Write the proportion equation
    308,794.72 : 426,039.61 = 172,807.06 : x
  2. Step 2: Convert to fraction form
    308,794.72/426,039.61 = 172,807.06/x
  3. Step 3: Cross multiply
    308,794.72x = 426,039.61 × 172,807.06
  4. Step 4: Simplify right side
    308,794.72x = 73,622,650,093.97
  5. Step 5: Solve for x
    x = 73,622,650,093.97/308,794.72
  6. Step 6: Final answer
    x = 238,419.40

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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.