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Finding the Fourth Proportional to 399,078.32, 550,740.23 and 227,021.21

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Solution

The fourth proportional to 399,078.32, 550,740.23 and 227,021.21 is: 313,296.18

Step by Step Solution

  1. Step 1: Write the proportion equation
    399,078.32 : 550,740.23 = 227,021.21 : x
  2. Step 2: Convert to fraction form
    399,078.32/550,740.23 = 227,021.21/x
  3. Step 3: Cross multiply
    399,078.32x = 550,740.23 × 227,021.21
  4. Step 4: Simplify right side
    399,078.32x = 125,029,712,438.08
  5. Step 5: Solve for x
    x = 125,029,712,438.08/399,078.32
  6. Step 6: Final answer
    x = 313,296.18

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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.