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Finding the Fourth Proportional to 253,459.80, 380,189.70 and 66,490.20

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Solution

The fourth proportional to 253,459.80, 380,189.70 and 66,490.20 is: 99,735.30

Step by Step Solution

  1. Step 1: Write the proportion equation
    253,459.80 : 380,189.70 = 66,490.20 : x
  2. Step 2: Convert to fraction form
    253,459.80/380,189.70 = 66,490.20/x
  3. Step 3: Cross multiply
    253,459.80x = 380,189.70 × 66,490.20
  4. Step 4: Simplify right side
    253,459.80x = 25,278,889,190.94
  5. Step 5: Solve for x
    x = 25,278,889,190.94/253,459.80
  6. Step 6: Final answer
    x = 99,735.30

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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.