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Finding the Fourth Proportional to 339,015.02, 508,325.61 and 128,538.14

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Solution

The fourth proportional to 339,015.02, 508,325.61 and 128,538.14 is: 192,732.55

Step by Step Solution

  1. Step 1: Write the proportion equation
    339,015.02 : 508,325.61 = 128,538.14 : x
  2. Step 2: Convert to fraction form
    339,015.02/508,325.61 = 128,538.14/x
  3. Step 3: Cross multiply
    339,015.02x = 508,325.61 × 128,538.14
  4. Step 4: Simplify right side
    339,015.02x = 65,339,228,423.77
  5. Step 5: Solve for x
    x = 65,339,228,423.77/339,015.02
  6. Step 6: Final answer
    x = 192,732.55

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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.