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Finding the Fourth Proportional to 255,800.76, 383,730.78 and 85,037.76

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Solution

The fourth proportional to 255,800.76, 383,730.78 and 85,037.76 is: 127,566.49

Step by Step Solution

  1. Step 1: Write the proportion equation
    255,800.76 : 383,730.78 = 85,037.76 : x
  2. Step 2: Convert to fraction form
    255,800.76/383,730.78 = 85,037.76/x
  3. Step 3: Cross multiply
    255,800.76x = 383,730.78 × 85,037.76
  4. Step 4: Simplify right side
    255,800.76x = 32,631,605,974.25
  5. Step 5: Solve for x
    x = 32,631,605,974.25/255,800.76
  6. Step 6: Final answer
    x = 127,566.49

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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.