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Finding the Fourth Proportional to 256,728.24, 385,129.26 and 79,250.45

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Solution

The fourth proportional to 256,728.24, 385,129.26 and 79,250.45 is: 118,887.06

Step by Step Solution

  1. Step 1: Write the proportion equation
    256,728.24 : 385,129.26 = 79,250.45 : x
  2. Step 2: Convert to fraction form
    256,728.24/385,129.26 = 79,250.45/x
  3. Step 3: Cross multiply
    256,728.24x = 385,129.26 × 79,250.45
  4. Step 4: Simplify right side
    256,728.24x = 30,521,665,237.52
  5. Step 5: Solve for x
    x = 30,521,665,237.52/256,728.24
  6. Step 6: Final answer
    x = 118,887.06

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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.