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Finding the Fourth Proportional to 647,477.39, 971,304.80 and 220,898.79

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Solution

The fourth proportional to 647,477.39, 971,304.80 and 220,898.79 is: 331,378.45

Step by Step Solution

  1. Step 1: Write the proportion equation
    647,477.39 : 971,304.80 = 220,898.79 : x
  2. Step 2: Convert to fraction form
    647,477.39/971,304.80 = 220,898.79/x
  3. Step 3: Cross multiply
    647,477.39x = 971,304.80 × 220,898.79
  4. Step 4: Simplify right side
    647,477.39x = 214,560,053,936.70
  5. Step 5: Solve for x
    x = 214,560,053,936.70/647,477.39
  6. Step 6: Final answer
    x = 331,378.45

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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.