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Finding the Fourth Proportional to 256,717.79, 385,265.87 and 121,782.27

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Solution

The fourth proportional to 256,717.79, 385,265.87 and 121,782.27 is: 182,763.15

Step by Step Solution

  1. Step 1: Write the proportion equation
    256,717.79 : 385,265.87 = 121,782.27 : x
  2. Step 2: Convert to fraction form
    256,717.79/385,265.87 = 121,782.27/x
  3. Step 3: Cross multiply
    256,717.79x = 385,265.87 × 121,782.27
  4. Step 4: Simplify right side
    256,717.79x = 46,918,551,593.21
  5. Step 5: Solve for x
    x = 46,918,551,593.21/256,717.79
  6. Step 6: Final answer
    x = 182,763.15

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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.