Home / 390,520.37-539,032.68-227,215.30

Finding the Fourth Proportional to 390,520.37, 539,032.68 and 227,215.30

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Solution

The fourth proportional to 390,520.37, 539,032.68 and 227,215.30 is: 313,623.77

Step by Step Solution

  1. Step 1: Write the proportion equation
    390,520.37 : 539,032.68 = 227,215.30 : x
  2. Step 2: Convert to fraction form
    390,520.37/539,032.68 = 227,215.30/x
  3. Step 3: Cross multiply
    390,520.37x = 539,032.68 × 227,215.30
  4. Step 4: Simplify right side
    390,520.37x = 122,476,469,400.84
  5. Step 5: Solve for x
    x = 122,476,469,400.84/390,520.37
  6. Step 6: Final answer
    x = 313,623.77

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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.