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Finding the Fourth Proportional to 395,513.89, 545,658.53 and 292,395.69

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Solution

The fourth proportional to 395,513.89, 545,658.53 and 292,395.69 is: 403,394.69

Step by Step Solution

  1. Step 1: Write the proportion equation
    395,513.89 : 545,658.53 = 292,395.69 : x
  2. Step 2: Convert to fraction form
    395,513.89/545,658.53 = 292,395.69/x
  3. Step 3: Cross multiply
    395,513.89x = 545,658.53 × 292,395.69
  4. Step 4: Simplify right side
    395,513.89x = 159,548,200,921.76
  5. Step 5: Solve for x
    x = 159,548,200,921.76/395,513.89
  6. Step 6: Final answer
    x = 403,394.69

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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.