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Finding the Fourth Proportional to 667,706.70, 921,433.98 and 361,791.36

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Solution

The fourth proportional to 667,706.70, 921,433.98 and 361,791.36 is: 499,271.39

Step by Step Solution

  1. Step 1: Write the proportion equation
    667,706.70 : 921,433.98 = 361,791.36 : x
  2. Step 2: Convert to fraction form
    667,706.70/921,433.98 = 361,791.36/x
  3. Step 3: Cross multiply
    667,706.70x = 921,433.98 × 361,791.36
  4. Step 4: Simplify right side
    667,706.70x = 333,366,852,774.41
  5. Step 5: Solve for x
    x = 333,366,852,774.41/667,706.70
  6. Step 6: Final answer
    x = 499,271.39

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1.5x scale

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.