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Finding the Fourth Proportional to 256,805.46, 385,256.62 and 79,270.95

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Solution

The fourth proportional to 256,805.46, 385,256.62 and 79,270.95 is: 118,921.38

Step by Step Solution

  1. Step 1: Write the proportion equation
    256,805.46 : 385,256.62 = 79,270.95 : x
  2. Step 2: Convert to fraction form
    256,805.46/385,256.62 = 79,270.95/x
  3. Step 3: Cross multiply
    256,805.46x = 385,256.62 × 79,270.95
  4. Step 4: Simplify right side
    256,805.46x = 30,539,658,261.19
  5. Step 5: Solve for x
    x = 30,539,658,261.19/256,805.46
  6. Step 6: Final answer
    x = 118,921.38

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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.