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Finding the Fourth Proportional to 395,641.54, 545,985.39 and 214,354.72

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Solution

The fourth proportional to 395,641.54, 545,985.39 and 214,354.72 is: 295,809.55

Step by Step Solution

  1. Step 1: Write the proportion equation
    395,641.54 : 545,985.39 = 214,354.72 : x
  2. Step 2: Convert to fraction form
    395,641.54/545,985.39 = 214,354.72/x
  3. Step 3: Cross multiply
    395,641.54x = 545,985.39 × 214,354.72
  4. Step 4: Simplify right side
    395,641.54x = 117,034,545,397.54
  5. Step 5: Solve for x
    x = 117,034,545,397.54/395,641.54
  6. Step 6: Final answer
    x = 295,809.55

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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.