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Finding the Fourth Proportional to 663,611.52, 915,782.78 and 377,131.80

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Solution

The fourth proportional to 663,611.52, 915,782.78 and 377,131.80 is: 520,441.25

Step by Step Solution

  1. Step 1: Write the proportion equation
    663,611.52 : 915,782.78 = 377,131.80 : x
  2. Step 2: Convert to fraction form
    663,611.52/915,782.78 = 377,131.80/x
  3. Step 3: Cross multiply
    663,611.52x = 915,782.78 × 377,131.80
  4. Step 4: Simplify right side
    663,611.52x = 345,370,808,230.40
  5. Step 5: Solve for x
    x = 345,370,808,230.40/663,611.52
  6. Step 6: Final answer
    x = 520,441.25

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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.