Home / 256,682.13-384,944.72-90,431.25

Finding the Fourth Proportional to 256,682.13, 384,944.72 and 90,431.25

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Solution

The fourth proportional to 256,682.13, 384,944.72 and 90,431.25 is: 135,619.23

Step by Step Solution

  1. Step 1: Write the proportion equation
    256,682.13 : 384,944.72 = 90,431.25 : x
  2. Step 2: Convert to fraction form
    256,682.13/384,944.72 = 90,431.25/x
  3. Step 3: Cross multiply
    256,682.13x = 384,944.72 × 90,431.25
  4. Step 4: Simplify right side
    256,682.13x = 34,811,031,758.34
  5. Step 5: Solve for x
    x = 34,811,031,758.34/256,682.13
  6. Step 6: Final answer
    x = 135,619.23

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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.