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Finding the Fourth Proportional to 408,349.80, 611,358.30 and 366,359.40

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Solution

The fourth proportional to 408,349.80, 611,358.30 and 366,359.40 is: 548,492.64

Step by Step Solution

  1. Step 1: Write the proportion equation
    408,349.80 : 611,358.30 = 366,359.40 : x
  2. Step 2: Convert to fraction form
    408,349.80/611,358.30 = 366,359.40/x
  3. Step 3: Cross multiply
    408,349.80x = 611,358.30 × 366,359.40
  4. Step 4: Simplify right side
    408,349.80x = 223,976,859,973.02
  5. Step 5: Solve for x
    x = 223,976,859,973.02/408,349.80
  6. Step 6: Final answer
    x = 548,492.64

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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.