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Finding the Fourth Proportional to 621,516.33, 857,683.76 and 349,583.94

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Solution

The fourth proportional to 621,516.33, 857,683.76 and 349,583.94 is: 482,420.90

Step by Step Solution

  1. Step 1: Write the proportion equation
    621,516.33 : 857,683.76 = 349,583.94 : x
  2. Step 2: Convert to fraction form
    621,516.33/857,683.76 = 349,583.94/x
  3. Step 3: Cross multiply
    621,516.33x = 857,683.76 × 349,583.94
  4. Step 4: Simplify right side
    621,516.33x = 299,832,466,346.90
  5. Step 5: Solve for x
    x = 299,832,466,346.90/621,516.33
  6. Step 6: Final answer
    x = 482,420.90

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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.