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Finding the Fourth Proportional to 669,139.25, 923,413 and 363,215.47

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Solution

The fourth proportional to 669,139.25, 923,413 and 363,215.47 is: 501,237.79

Step by Step Solution

  1. Step 1: Write the proportion equation
    669,139.25 : 923,413 = 363,215.47 : x
  2. Step 2: Convert to fraction form
    669,139.25/923,413 = 363,215.47/x
  3. Step 3: Cross multiply
    669,139.25x = 923,413 × 363,215.47
  4. Step 4: Simplify right side
    669,139.25x = 335,397,882,182.05
  5. Step 5: Solve for x
    x = 335,397,882,182.05/669,139.25
  6. Step 6: Final answer
    x = 501,237.79

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1.5x scale

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.