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Finding the Fourth Proportional to 339,151.91, 508,799.86 and 128,785.19

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Solution

The fourth proportional to 339,151.91, 508,799.86 and 128,785.19 is: 193,205.12

Step by Step Solution

  1. Step 1: Write the proportion equation
    339,151.91 : 508,799.86 = 128,785.19 : x
  2. Step 2: Convert to fraction form
    339,151.91/508,799.86 = 128,785.19/x
  3. Step 3: Cross multiply
    339,151.91x = 508,799.86 × 128,785.19
  4. Step 4: Simplify right side
    339,151.91x = 65,525,883,776.11
  5. Step 5: Solve for x
    x = 65,525,883,776.11/339,151.91
  6. Step 6: Final answer
    x = 193,205.12

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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.