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Finding the Fourth Proportional to 253,739.80, 380,615.87 and 85,262.57

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Solution

The fourth proportional to 253,739.80, 380,615.87 and 85,262.57 is: 127,895.92

Step by Step Solution

  1. Step 1: Write the proportion equation
    253,739.80 : 380,615.87 = 85,262.57 : x
  2. Step 2: Convert to fraction form
    253,739.80/380,615.87 = 85,262.57/x
  3. Step 3: Cross multiply
    253,739.80x = 380,615.87 × 85,262.57
  4. Step 4: Simplify right side
    253,739.80x = 32,452,285,569.06
  5. Step 5: Solve for x
    x = 32,452,285,569.06/253,739.80
  6. Step 6: Final answer
    x = 127,895.92

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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.