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Finding the Fourth Proportional to 642,611.80, 963,917.70 and 376,672.60

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Solution

The fourth proportional to 642,611.80, 963,917.70 and 376,672.60 is: 565,008.90

Step by Step Solution

  1. Step 1: Write the proportion equation
    642,611.80 : 963,917.70 = 376,672.60 : x
  2. Step 2: Convert to fraction form
    642,611.80/963,917.70 = 376,672.60/x
  3. Step 3: Cross multiply
    642,611.80x = 963,917.70 × 376,672.60
  4. Step 4: Simplify right side
    642,611.80x = 363,081,386,245.02
  5. Step 5: Solve for x
    x = 363,081,386,245.02/642,611.80
  6. Step 6: Final answer
    x = 565,008.90

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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.