Home / 338,971.28-508,257.56-128,624

Finding the Fourth Proportional to 338,971.28, 508,257.56 and 128,624

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Solution

The fourth proportional to 338,971.28, 508,257.56 and 128,624 is: 192,860.35

Step by Step Solution

  1. Step 1: Write the proportion equation
    338,971.28 : 508,257.56 = 128,624 : x
  2. Step 2: Convert to fraction form
    338,971.28/508,257.56 = 128,624/x
  3. Step 3: Cross multiply
    338,971.28x = 508,257.56 × 128,624
  4. Step 4: Simplify right side
    338,971.28x = 65,374,120,397.44
  5. Step 5: Solve for x
    x = 65,374,120,397.44/338,971.28
  6. Step 6: Final answer
    x = 192,860.35

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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.