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Finding the Fourth Proportional to 639,315.38, 959,401.11 and 265,338.74

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Solution

The fourth proportional to 639,315.38, 959,401.11 and 265,338.74 is: 398,185.76

Step by Step Solution

  1. Step 1: Write the proportion equation
    639,315.38 : 959,401.11 = 265,338.74 : x
  2. Step 2: Convert to fraction form
    639,315.38/959,401.11 = 265,338.74/x
  3. Step 3: Cross multiply
    639,315.38x = 959,401.11 × 265,338.74
  4. Step 4: Simplify right side
    639,315.38x = 254,566,281,682.00
  5. Step 5: Solve for x
    x = 254,566,281,682.00/639,315.38
  6. Step 6: Final answer
    x = 398,185.76

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Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.