Home / 783,142.20-1,172,963.70-643,174.20

Finding the Fourth Proportional to 783,142.20, 1,172,963.70 and 643,174.20

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Solution

The fourth proportional to 783,142.20, 1,172,963.70 and 643,174.20 is: 963,324.40

Step by Step Solution

  1. Step 1: Write the proportion equation
    783,142.20 : 1,172,963.70 = 643,174.20 : x
  2. Step 2: Convert to fraction form
    783,142.20/1,172,963.70 = 643,174.20/x
  3. Step 3: Cross multiply
    783,142.20x = 1,172,963.70 × 643,174.20
  4. Step 4: Simplify right side
    783,142.20x = 754,419,989,376.54
  5. Step 5: Solve for x
    x = 754,419,989,376.54/783,142.20
  6. Step 6: Final answer
    x = 963,324.40

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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.