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Finding the Fourth Proportional to 253,762.32, 380,687.40 and 85,299.12

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Solution

The fourth proportional to 253,762.32, 380,687.40 and 85,299.12 is: 127,963.44

Step by Step Solution

  1. Step 1: Write the proportion equation
    253,762.32 : 380,687.40 = 85,299.12 : x
  2. Step 2: Convert to fraction form
    253,762.32/380,687.40 = 85,299.12/x
  3. Step 3: Cross multiply
    253,762.32x = 380,687.40 × 85,299.12
  4. Step 4: Simplify right side
    253,762.32x = 32,472,300,215.09
  5. Step 5: Solve for x
    x = 32,472,300,215.09/253,762.32
  6. Step 6: Final answer
    x = 127,963.44

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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.