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Finding the Fourth Proportional to 253,795.64, 380,679.46 and 85,298.57

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Solution

The fourth proportional to 253,795.64, 380,679.46 and 85,298.57 is: 127,943.15

Step by Step Solution

  1. Step 1: Write the proportion equation
    253,795.64 : 380,679.46 = 85,298.57 : x
  2. Step 2: Convert to fraction form
    253,795.64/380,679.46 = 85,298.57/x
  3. Step 3: Cross multiply
    253,795.64x = 380,679.46 × 85,298.57
  4. Step 4: Simplify right side
    253,795.64x = 32,471,414,304.82
  5. Step 5: Solve for x
    x = 32,471,414,304.82/253,795.64
  6. Step 6: Final answer
    x = 127,943.15

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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.