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Finding the Fourth Proportional to 408,602.40, 611,737.20 and 361,946.40

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Solution

The fourth proportional to 408,602.40, 611,737.20 and 361,946.40 is: 541,886.38

Step by Step Solution

  1. Step 1: Write the proportion equation
    408,602.40 : 611,737.20 = 361,946.40 : x
  2. Step 2: Convert to fraction form
    408,602.40/611,737.20 = 361,946.40/x
  3. Step 3: Cross multiply
    408,602.40x = 611,737.20 × 361,946.40
  4. Step 4: Simplify right side
    408,602.40x = 221,416,077,286.08
  5. Step 5: Solve for x
    x = 221,416,077,286.08/408,602.40
  6. Step 6: Final answer
    x = 541,886.38

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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.