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Finding the Fourth Proportional to 395,511.62, 545,655.42 and 292,393.40

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Solution

The fourth proportional to 395,511.62, 545,655.42 and 292,393.40 is: 403,391.54

Step by Step Solution

  1. Step 1: Write the proportion equation
    395,511.62 : 545,655.42 = 292,393.40 : x
  2. Step 2: Convert to fraction form
    395,511.62/545,655.42 = 292,393.40/x
  3. Step 3: Cross multiply
    395,511.62x = 545,655.42 × 292,393.40
  4. Step 4: Simplify right side
    395,511.62x = 159,546,040,753.95
  5. Step 5: Solve for x
    x = 159,546,040,753.95/395,511.62
  6. Step 6: Final answer
    x = 403,391.54

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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.