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Finding the Fourth Proportional to 647,381.80, 971,072.70 and 367,445.80

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Solution

The fourth proportional to 647,381.80, 971,072.70 and 367,445.80 is: 551,168.70

Step by Step Solution

  1. Step 1: Write the proportion equation
    647,381.80 : 971,072.70 = 367,445.80 : x
  2. Step 2: Convert to fraction form
    647,381.80/971,072.70 = 367,445.80/x
  3. Step 3: Cross multiply
    647,381.80x = 971,072.70 × 367,445.80
  4. Step 4: Simplify right side
    647,381.80x = 356,816,585,109.66
  5. Step 5: Solve for x
    x = 356,816,585,109.66/647,381.80
  6. Step 6: Final answer
    x = 551,168.70

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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.