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Finding the Fourth Proportional to 256,393.36, 384,348.12 and 90,090.64

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Solution

The fourth proportional to 256,393.36, 384,348.12 and 90,090.64 is: 135,050.95

Step by Step Solution

  1. Step 1: Write the proportion equation
    256,393.36 : 384,348.12 = 90,090.64 : x
  2. Step 2: Convert to fraction form
    256,393.36/384,348.12 = 90,090.64/x
  3. Step 3: Cross multiply
    256,393.36x = 384,348.12 × 90,090.64
  4. Step 4: Simplify right side
    256,393.36x = 34,626,168,113.60
  5. Step 5: Solve for x
    x = 34,626,168,113.60/256,393.36
  6. Step 6: Final answer
    x = 135,050.95

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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.