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Finding the Fourth Proportional to 662,780.20, 994,461.90 and 307,611.40

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Solution

The fourth proportional to 662,780.20, 994,461.90 and 307,611.40 is: 461,552.44

Step by Step Solution

  1. Step 1: Write the proportion equation
    662,780.20 : 994,461.90 = 307,611.40 : x
  2. Step 2: Convert to fraction form
    662,780.20/994,461.90 = 307,611.40/x
  3. Step 3: Cross multiply
    662,780.20x = 994,461.90 × 307,611.40
  4. Step 4: Simplify right side
    662,780.20x = 305,907,817,305.66
  5. Step 5: Solve for x
    x = 305,907,817,305.66/662,780.20
  6. Step 6: Final answer
    x = 461,552.44

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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.