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Finding the Fourth Proportional to 647,793.91, 893,956.80 and 361,332.55

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Solution

The fourth proportional to 647,793.91, 893,956.80 and 361,332.55 is: 498,639.59

Step by Step Solution

  1. Step 1: Write the proportion equation
    647,793.91 : 893,956.80 = 361,332.55 : x
  2. Step 2: Convert to fraction form
    647,793.91/893,956.80 = 361,332.55/x
  3. Step 3: Cross multiply
    647,793.91x = 893,956.80 × 361,332.55
  4. Step 4: Simplify right side
    647,793.91x = 323,015,690,133.84
  5. Step 5: Solve for x
    x = 323,015,690,133.84/647,793.91
  6. Step 6: Final answer
    x = 498,639.59

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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.