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Finding the Fourth Proportional to 255,382.30, 383,136.09 and 128,711.26

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Solution

The fourth proportional to 255,382.30, 383,136.09 and 128,711.26 is: 193,098.46

Step by Step Solution

  1. Step 1: Write the proportion equation
    255,382.30 : 383,136.09 = 128,711.26 : x
  2. Step 2: Convert to fraction form
    255,382.30/383,136.09 = 128,711.26/x
  3. Step 3: Cross multiply
    255,382.30x = 383,136.09 × 128,711.26
  4. Step 4: Simplify right side
    255,382.30x = 49,313,928,895.37
  5. Step 5: Solve for x
    x = 49,313,928,895.37/255,382.30
  6. Step 6: Final answer
    x = 193,098.46

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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.