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Finding the Fourth Proportional to 255,138.28, 385,103.83 and 255,138.28

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Solution

The fourth proportional to 255,138.28, 385,103.83 and 255,138.28 is: 385,103.83

Step by Step Solution

  1. Step 1: Write the proportion equation
    255,138.28 : 385,103.83 = 255,138.28 : x
  2. Step 2: Convert to fraction form
    255,138.28/385,103.83 = 255,138.28/x
  3. Step 3: Cross multiply
    255,138.28x = 385,103.83 × 255,138.28
  4. Step 4: Simplify right side
    255,138.28x = 98,254,728,807.61
  5. Step 5: Solve for x
    x = 98,254,728,807.61/255,138.28
  6. Step 6: Final answer
    x = 385,103.83

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.51) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.