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Finding the Fourth Proportional to 680,907.80, 1,021,361.70 and 415,187.30

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Solution

The fourth proportional to 680,907.80, 1,021,361.70 and 415,187.30 is: 622,780.95

Step by Step Solution

  1. Step 1: Write the proportion equation
    680,907.80 : 1,021,361.70 = 415,187.30 : x
  2. Step 2: Convert to fraction form
    680,907.80/1,021,361.70 = 415,187.30/x
  3. Step 3: Cross multiply
    680,907.80x = 1,021,361.70 × 415,187.30
  4. Step 4: Simplify right side
    680,907.80x = 424,056,406,546.41
  5. Step 5: Solve for x
    x = 424,056,406,546.41/680,907.80
  6. Step 6: Final answer
    x = 622,780.95

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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.