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Finding the Fourth Proportional to 662,940.79, 914,834.10 and 405,249.32

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Solution

The fourth proportional to 662,940.79, 914,834.10 and 405,249.32 is: 559,229.27

Step by Step Solution

  1. Step 1: Write the proportion equation
    662,940.79 : 914,834.10 = 405,249.32 : x
  2. Step 2: Convert to fraction form
    662,940.79/914,834.10 = 405,249.32/x
  3. Step 3: Cross multiply
    662,940.79x = 914,834.10 × 405,249.32
  4. Step 4: Simplify right side
    662,940.79x = 370,735,896,937.81
  5. Step 5: Solve for x
    x = 370,735,896,937.81/662,940.79
  6. Step 6: Final answer
    x = 559,229.27

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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.