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Finding the Fourth Proportional to 255,381.30, 383,134.59 and 128,710.26

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Solution

The fourth proportional to 255,381.30, 383,134.59 and 128,710.26 is: 193,096.96

Step by Step Solution

  1. Step 1: Write the proportion equation
    255,381.30 : 383,134.59 = 128,710.26 : x
  2. Step 2: Convert to fraction form
    255,381.30/383,134.59 = 128,710.26/x
  3. Step 3: Cross multiply
    255,381.30x = 383,134.59 × 128,710.26
  4. Step 4: Simplify right side
    255,381.30x = 49,313,352,693.89
  5. Step 5: Solve for x
    x = 49,313,352,693.89/255,381.30
  6. Step 6: Final answer
    x = 193,096.96

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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.