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Finding the Fourth Proportional to 664,295.36, 916,411.82 and 392,180.95

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Solution

The fourth proportional to 664,295.36, 916,411.82 and 392,180.95 is: 541,023.29

Step by Step Solution

  1. Step 1: Write the proportion equation
    664,295.36 : 916,411.82 = 392,180.95 : x
  2. Step 2: Convert to fraction form
    664,295.36/916,411.82 = 392,180.95/x
  3. Step 3: Cross multiply
    664,295.36x = 916,411.82 × 392,180.95
  4. Step 4: Simplify right side
    664,295.36x = 359,399,256,848.25
  5. Step 5: Solve for x
    x = 359,399,256,848.25/664,295.36
  6. Step 6: Final answer
    x = 541,023.29

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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.