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Finding the Fourth Proportional to 256,218.60, 384,327.90 and 231,335.40

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Solution

The fourth proportional to 256,218.60, 384,327.90 and 231,335.40 is: 347,003.10

Step by Step Solution

  1. Step 1: Write the proportion equation
    256,218.60 : 384,327.90 = 231,335.40 : x
  2. Step 2: Convert to fraction form
    256,218.60/384,327.90 = 231,335.40/x
  3. Step 3: Cross multiply
    256,218.60x = 384,327.90 × 231,335.40
  4. Step 4: Simplify right side
    256,218.60x = 88,908,648,477.66
  5. Step 5: Solve for x
    x = 88,908,648,477.66/256,218.60
  6. Step 6: Final answer
    x = 347,003.10

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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.