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Finding the Fourth Proportional to 255,406.32, 383,108.76 and 115,000.56

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Solution

The fourth proportional to 255,406.32, 383,108.76 and 115,000.56 is: 172,500.52

Step by Step Solution

  1. Step 1: Write the proportion equation
    255,406.32 : 383,108.76 = 115,000.56 : x
  2. Step 2: Convert to fraction form
    255,406.32/383,108.76 = 115,000.56/x
  3. Step 3: Cross multiply
    255,406.32x = 383,108.76 × 115,000.56
  4. Step 4: Simplify right side
    255,406.32x = 44,057,721,940.91
  5. Step 5: Solve for x
    x = 44,057,721,940.91/255,406.32
  6. Step 6: Final answer
    x = 172,500.52

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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.