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Finding the Fourth Proportional to 390,521.37, 539,034.06 and 227,216.30

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Solution

The fourth proportional to 390,521.37, 539,034.06 and 227,216.30 is: 313,625.15

Step by Step Solution

  1. Step 1: Write the proportion equation
    390,521.37 : 539,034.06 = 227,216.30 : x
  2. Step 2: Convert to fraction form
    390,521.37/539,034.06 = 227,216.30/x
  3. Step 3: Cross multiply
    390,521.37x = 539,034.06 × 227,216.30
  4. Step 4: Simplify right side
    390,521.37x = 122,477,324,687.18
  5. Step 5: Solve for x
    x = 122,477,324,687.18/390,521.37
  6. Step 6: Final answer
    x = 313,625.15

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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.