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Finding the Fourth Proportional to 256,844.60, 385,266.90 and 79,335.80

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Solution

The fourth proportional to 256,844.60, 385,266.90 and 79,335.80 is: 119,003.70

Step by Step Solution

  1. Step 1: Write the proportion equation
    256,844.60 : 385,266.90 = 79,335.80 : x
  2. Step 2: Convert to fraction form
    256,844.60/385,266.90 = 79,335.80/x
  3. Step 3: Cross multiply
    256,844.60x = 385,266.90 × 79,335.80
  4. Step 4: Simplify right side
    256,844.60x = 30,565,457,725.02
  5. Step 5: Solve for x
    x = 30,565,457,725.02/256,844.60
  6. Step 6: Final answer
    x = 119,003.70

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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.