Home / 338,970.28-508,256.06-128,623

Finding the Fourth Proportional to 338,970.28, 508,256.06 and 128,623

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Solution

The fourth proportional to 338,970.28, 508,256.06 and 128,623 is: 192,858.85

Step by Step Solution

  1. Step 1: Write the proportion equation
    338,970.28 : 508,256.06 = 128,623 : x
  2. Step 2: Convert to fraction form
    338,970.28/508,256.06 = 128,623/x
  3. Step 3: Cross multiply
    338,970.28x = 508,256.06 × 128,623
  4. Step 4: Simplify right side
    338,970.28x = 65,373,419,205.38
  5. Step 5: Solve for x
    x = 65,373,419,205.38/338,970.28
  6. Step 6: Final answer
    x = 192,858.85

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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.