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Finding the Fourth Proportional to 641,739.28, 885,610.76 and 351,346

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Solution

The fourth proportional to 641,739.28, 885,610.76 and 351,346 is: 484,863.26

Step by Step Solution

  1. Step 1: Write the proportion equation
    641,739.28 : 885,610.76 = 351,346 : x
  2. Step 2: Convert to fraction form
    641,739.28/885,610.76 = 351,346/x
  3. Step 3: Cross multiply
    641,739.28x = 885,610.76 × 351,346
  4. Step 4: Simplify right side
    641,739.28x = 311,155,798,082.96
  5. Step 5: Solve for x
    x = 311,155,798,082.96/641,739.28
  6. Step 6: Final answer
    x = 484,863.26

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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.