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Finding the Fourth Proportional to 256,627.88, 384,917 and 79,087.20

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Solution

The fourth proportional to 256,627.88, 384,917 and 79,087.20 is: 118,623.15

Step by Step Solution

  1. Step 1: Write the proportion equation
    256,627.88 : 384,917 = 79,087.20 : x
  2. Step 2: Convert to fraction form
    256,627.88/384,917 = 79,087.20/x
  3. Step 3: Cross multiply
    256,627.88x = 384,917 × 79,087.20
  4. Step 4: Simplify right side
    256,627.88x = 30,442,007,762.40
  5. Step 5: Solve for x
    x = 30,442,007,762.40/256,627.88
  6. Step 6: Final answer
    x = 118,623.15

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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.