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Finding the Fourth Proportional to 338,954.40, 508,474.80 and 128,652.48

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Solution

The fourth proportional to 338,954.40, 508,474.80 and 128,652.48 is: 192,995.12

Step by Step Solution

  1. Step 1: Write the proportion equation
    338,954.40 : 508,474.80 = 128,652.48 : x
  2. Step 2: Convert to fraction form
    338,954.40/508,474.80 = 128,652.48/x
  3. Step 3: Cross multiply
    338,954.40x = 508,474.80 × 128,652.48
  4. Step 4: Simplify right side
    338,954.40x = 65,416,544,037.50
  5. Step 5: Solve for x
    x = 65,416,544,037.50/338,954.40
  6. Step 6: Final answer
    x = 192,995.12

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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.