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Finding the Fourth Proportional to 643,047.30, 887,362.02 and 356,556.78

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Solution

The fourth proportional to 643,047.30, 887,362.02 and 356,556.78 is: 492,024.37

Step by Step Solution

  1. Step 1: Write the proportion equation
    643,047.30 : 887,362.02 = 356,556.78 : x
  2. Step 2: Convert to fraction form
    643,047.30/887,362.02 = 356,556.78/x
  3. Step 3: Cross multiply
    643,047.30x = 887,362.02 × 356,556.78
  4. Step 4: Simplify right side
    643,047.30x = 316,394,944,545.50
  5. Step 5: Solve for x
    x = 316,394,944,545.50/643,047.30
  6. Step 6: Final answer
    x = 492,024.37

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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.