Home / 318,420.36-439,237.62-198,981

Finding the Fourth Proportional to 318,420.36, 439,237.62 and 198,981

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Solution

The fourth proportional to 318,420.36, 439,237.62 and 198,981 is: 274,479.75

Step by Step Solution

  1. Step 1: Write the proportion equation
    318,420.36 : 439,237.62 = 198,981 : x
  2. Step 2: Convert to fraction form
    318,420.36/439,237.62 = 198,981/x
  3. Step 3: Cross multiply
    318,420.36x = 439,237.62 × 198,981
  4. Step 4: Simplify right side
    318,420.36x = 87,399,940,865.22
  5. Step 5: Solve for x
    x = 87,399,940,865.22/318,420.36
  6. Step 6: Final answer
    x = 274,479.75

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.