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Finding the Fourth Proportional to 256,845.40, 385,268.10 and 90,633.40

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Solution

The fourth proportional to 256,845.40, 385,268.10 and 90,633.40 is: 135,950.10

Step by Step Solution

  1. Step 1: Write the proportion equation
    256,845.40 : 385,268.10 = 90,633.40 : x
  2. Step 2: Convert to fraction form
    256,845.40/385,268.10 = 90,633.40/x
  3. Step 3: Cross multiply
    256,845.40x = 385,268.10 × 90,633.40
  4. Step 4: Simplify right side
    256,845.40x = 34,918,157,814.54
  5. Step 5: Solve for x
    x = 34,918,157,814.54/256,845.40
  6. Step 6: Final answer
    x = 135,950.10

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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.