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Finding the Fourth Proportional to 308,903.73, 426,267.07 and 172,936.59

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Solution

The fourth proportional to 308,903.73, 426,267.07 and 172,936.59 is: 238,641.25

Step by Step Solution

  1. Step 1: Write the proportion equation
    308,903.73 : 426,267.07 = 172,936.59 : x
  2. Step 2: Convert to fraction form
    308,903.73/426,267.07 = 172,936.59/x
  3. Step 3: Cross multiply
    308,903.73x = 426,267.07 × 172,936.59
  4. Step 4: Simplify right side
    308,903.73x = 73,717,173,515.09
  5. Step 5: Solve for x
    x = 73,717,173,515.09/308,903.73
  6. Step 6: Final answer
    x = 238,641.25

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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.