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Finding the Fourth Proportional to 308,911.64, 426,171.36 and 187,955.96

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Solution

The fourth proportional to 308,911.64, 426,171.36 and 187,955.96 is: 259,302.13

Step by Step Solution

  1. Step 1: Write the proportion equation
    308,911.64 : 426,171.36 = 187,955.96 : x
  2. Step 2: Convert to fraction form
    308,911.64/426,171.36 = 187,955.96/x
  3. Step 3: Cross multiply
    308,911.64x = 426,171.36 × 187,955.96
  4. Step 4: Simplify right side
    308,911.64x = 80,101,447,093.31
  5. Step 5: Solve for x
    x = 80,101,447,093.31/308,911.64
  6. Step 6: Final answer
    x = 259,302.13

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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.