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Finding the Fourth Proportional to 256,780.84, 385,170.16 and 69,791.80

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Solution

The fourth proportional to 256,780.84, 385,170.16 and 69,791.80 is: 104,687.40

Step by Step Solution

  1. Step 1: Write the proportion equation
    256,780.84 : 385,170.16 = 69,791.80 : x
  2. Step 2: Convert to fraction form
    256,780.84/385,170.16 = 69,791.80/x
  3. Step 3: Cross multiply
    256,780.84x = 385,170.16 × 69,791.80
  4. Step 4: Simplify right side
    256,780.84x = 26,881,718,772.69
  5. Step 5: Solve for x
    x = 26,881,718,772.69/256,780.84
  6. Step 6: Final answer
    x = 104,687.40

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.