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Finding the Fourth Proportional to 873,781.80, 1,310,672.70 and 747,810.60

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Solution

The fourth proportional to 873,781.80, 1,310,672.70 and 747,810.60 is: 1,121,715.90

Step by Step Solution

  1. Step 1: Write the proportion equation
    873,781.80 : 1,310,672.70 = 747,810.60 : x
  2. Step 2: Convert to fraction form
    873,781.80/1,310,672.70 = 747,810.60/x
  3. Step 3: Cross multiply
    873,781.80x = 1,310,672.70 × 747,810.60
  4. Step 4: Simplify right side
    873,781.80x = 980,134,938,190.62
  5. Step 5: Solve for x
    x = 980,134,938,190.62/873,781.80
  6. Step 6: Final answer
    x = 1,121,715.90

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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.