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Finding the Fourth Proportional to 620,945.84, 930,639.54 and 265,541.96

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Solution

The fourth proportional to 620,945.84, 930,639.54 and 265,541.96 is: 397,979.71

Step by Step Solution

  1. Step 1: Write the proportion equation
    620,945.84 : 930,639.54 = 265,541.96 : x
  2. Step 2: Convert to fraction form
    620,945.84/930,639.54 = 265,541.96/x
  3. Step 3: Cross multiply
    620,945.84x = 930,639.54 × 265,541.96
  4. Step 4: Simplify right side
    620,945.84x = 247,123,847,505.10
  5. Step 5: Solve for x
    x = 247,123,847,505.10/620,945.84
  6. Step 6: Final answer
    x = 397,979.71

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Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.