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Finding the Fourth Proportional to 1,137,811.76, 1,706,966.90 and 427,839.80

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Solution

The fourth proportional to 1,137,811.76, 1,706,966.90 and 427,839.80 is: 641,853.43

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,137,811.76 : 1,706,966.90 = 427,839.80 : x
  2. Step 2: Convert to fraction form
    1,137,811.76/1,706,966.90 = 427,839.80/x
  3. Step 3: Cross multiply
    1,137,811.76x = 1,706,966.90 × 427,839.80
  4. Step 4: Simplify right side
    1,137,811.76x = 730,308,377,102.62
  5. Step 5: Solve for x
    x = 730,308,377,102.62/1,137,811.76
  6. Step 6: Final answer
    x = 641,853.43

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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.