Home / 709,983.10-979,782.02-404,082.78

Finding the Fourth Proportional to 709,983.10, 979,782.02 and 404,082.78

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Solution

The fourth proportional to 709,983.10, 979,782.02 and 404,082.78 is: 557,637.28

Step by Step Solution

  1. Step 1: Write the proportion equation
    709,983.10 : 979,782.02 = 404,082.78 : x
  2. Step 2: Convert to fraction form
    709,983.10/979,782.02 = 404,082.78/x
  3. Step 3: Cross multiply
    709,983.10x = 979,782.02 × 404,082.78
  4. Step 4: Simplify right side
    709,983.10x = 395,913,042,435.62
  5. Step 5: Solve for x
    x = 395,913,042,435.62/709,983.10
  6. Step 6: Final answer
    x = 557,637.28

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Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.