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Finding the Fourth Proportional to 647,781.40, 893,939.56 and 361,320.04

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Solution

The fourth proportional to 647,781.40, 893,939.56 and 361,320.04 is: 498,622.34

Step by Step Solution

  1. Step 1: Write the proportion equation
    647,781.40 : 893,939.56 = 361,320.04 : x
  2. Step 2: Convert to fraction form
    647,781.40/893,939.56 = 361,320.04/x
  3. Step 3: Cross multiply
    647,781.40x = 893,939.56 × 361,320.04
  4. Step 4: Simplify right side
    647,781.40x = 322,998,277,576.78
  5. Step 5: Solve for x
    x = 322,998,277,576.78/647,781.40
  6. Step 6: Final answer
    x = 498,622.34

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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.