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Finding the Fourth Proportional to 255,139.28, 385,105.34 and 255,139.28

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Solution

The fourth proportional to 255,139.28, 385,105.34 and 255,139.28 is: 385,105.34

Step by Step Solution

  1. Step 1: Write the proportion equation
    255,139.28 : 385,105.34 = 255,139.28 : x
  2. Step 2: Convert to fraction form
    255,139.28/385,105.34 = 255,139.28/x
  3. Step 3: Cross multiply
    255,139.28x = 385,105.34 × 255,139.28
  4. Step 4: Simplify right side
    255,139.28x = 98,255,499,171.76
  5. Step 5: Solve for x
    x = 98,255,499,171.76/255,139.28
  6. Step 6: Final answer
    x = 385,105.34

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