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Finding the Fourth Proportional to 621,732.69, 857,991.14 and 353,460.69

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Solution

The fourth proportional to 621,732.69, 857,991.14 and 353,460.69 is: 487,775.77

Step by Step Solution

  1. Step 1: Write the proportion equation
    621,732.69 : 857,991.14 = 353,460.69 : x
  2. Step 2: Convert to fraction form
    621,732.69/857,991.14 = 353,460.69/x
  3. Step 3: Cross multiply
    621,732.69x = 857,991.14 × 353,460.69
  4. Step 4: Simplify right side
    621,732.69x = 303,266,140,358.29
  5. Step 5: Solve for x
    x = 303,266,140,358.29/621,732.69
  6. Step 6: Final answer
    x = 487,775.77

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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.