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Finding the Fourth Proportional to 553,313.31, 763,604.92 and 338,494.55

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Solution

The fourth proportional to 553,313.31, 763,604.92 and 338,494.55 is: 467,142.39

Step by Step Solution

  1. Step 1: Write the proportion equation
    553,313.31 : 763,604.92 = 338,494.55 : x
  2. Step 2: Convert to fraction form
    553,313.31/763,604.92 = 338,494.55/x
  3. Step 3: Cross multiply
    553,313.31x = 763,604.92 × 338,494.55
  4. Step 4: Simplify right side
    553,313.31x = 258,476,102,080.71
  5. Step 5: Solve for x
    x = 258,476,102,080.71/553,313.31
  6. Step 6: Final answer
    x = 467,142.39

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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.