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Finding the Fourth Proportional to 1,171,860.53, 1,755,972.63 and 812,731.90

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Solution

The fourth proportional to 1,171,860.53, 1,755,972.63 and 812,731.90 is: 1,217,836.87

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,171,860.53 : 1,755,972.63 = 812,731.90 : x
  2. Step 2: Convert to fraction form
    1,171,860.53/1,755,972.63 = 812,731.90/x
  3. Step 3: Cross multiply
    1,171,860.53x = 1,755,972.63 × 812,731.90
  4. Step 4: Simplify right side
    1,171,860.53x = 1,427,134,967,537.97
  5. Step 5: Solve for x
    x = 1,427,134,967,537.97/1,171,860.53
  6. Step 6: Final answer
    x = 1,217,836.87

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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.