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Finding the Fourth Proportional to 256,534.20, 384,801.30 and 90,300.60

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Solution

The fourth proportional to 256,534.20, 384,801.30 and 90,300.60 is: 135,450.90

Step by Step Solution

  1. Step 1: Write the proportion equation
    256,534.20 : 384,801.30 = 90,300.60 : x
  2. Step 2: Convert to fraction form
    256,534.20/384,801.30 = 90,300.60/x
  3. Step 3: Cross multiply
    256,534.20x = 384,801.30 × 90,300.60
  4. Step 4: Simplify right side
    256,534.20x = 34,747,788,270.78
  5. Step 5: Solve for x
    x = 34,747,788,270.78/256,534.20
  6. Step 6: Final answer
    x = 135,450.90

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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.