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Finding the Fourth Proportional to 256,523.70, 384,785.54 and 69,535.20

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Solution

The fourth proportional to 256,523.70, 384,785.54 and 69,535.20 is: 104,302.80

Step by Step Solution

  1. Step 1: Write the proportion equation
    256,523.70 : 384,785.54 = 69,535.20 : x
  2. Step 2: Convert to fraction form
    256,523.70/384,785.54 = 69,535.20/x
  3. Step 3: Cross multiply
    256,523.70x = 384,785.54 × 69,535.20
  4. Step 4: Simplify right side
    256,523.70x = 26,756,139,481.01
  5. Step 5: Solve for x
    x = 26,756,139,481.01/256,523.70
  6. Step 6: Final answer
    x = 104,302.80

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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.