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Finding the Fourth Proportional to 714,841.45, 986,481.21 and 392,556.93

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Solution

The fourth proportional to 714,841.45, 986,481.21 and 392,556.93 is: 541,728.57

Step by Step Solution

  1. Step 1: Write the proportion equation
    714,841.45 : 986,481.21 = 392,556.93 : x
  2. Step 2: Convert to fraction form
    714,841.45/986,481.21 = 392,556.93/x
  3. Step 3: Cross multiply
    714,841.45x = 986,481.21 × 392,556.93
  4. Step 4: Simplify right side
    714,841.45x = 387,250,035,309.83
  5. Step 5: Solve for x
    x = 387,250,035,309.83/714,841.45
  6. Step 6: Final answer
    x = 541,728.57

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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.