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Finding the Fourth Proportional to 625,402.37, 863,147.82 and 395,980.98

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Solution

The fourth proportional to 625,402.37, 863,147.82 and 395,980.98 is: 546,512.35

Step by Step Solution

  1. Step 1: Write the proportion equation
    625,402.37 : 863,147.82 = 395,980.98 : x
  2. Step 2: Convert to fraction form
    625,402.37/863,147.82 = 395,980.98/x
  3. Step 3: Cross multiply
    625,402.37x = 863,147.82 × 395,980.98
  4. Step 4: Simplify right side
    625,402.37x = 341,790,119,648.46
  5. Step 5: Solve for x
    x = 341,790,119,648.46/625,402.37
  6. Step 6: Final answer
    x = 546,512.35

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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.