Home / 338,968.28-508,253.06-128,621

Finding the Fourth Proportional to 338,968.28, 508,253.06 and 128,621

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Solution

The fourth proportional to 338,968.28, 508,253.06 and 128,621 is: 192,855.85

Step by Step Solution

  1. Step 1: Write the proportion equation
    338,968.28 : 508,253.06 = 128,621 : x
  2. Step 2: Convert to fraction form
    338,968.28/508,253.06 = 128,621/x
  3. Step 3: Cross multiply
    338,968.28x = 508,253.06 × 128,621
  4. Step 4: Simplify right side
    338,968.28x = 65,372,016,830.26
  5. Step 5: Solve for x
    x = 65,372,016,830.26/338,968.28
  6. Step 6: Final answer
    x = 192,855.85

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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.