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Finding the Fourth Proportional to 669,636.72, 923,689.44 and 397,519.92

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Solution

The fourth proportional to 669,636.72, 923,689.44 and 397,519.92 is: 548,334.55

Step by Step Solution

  1. Step 1: Write the proportion equation
    669,636.72 : 923,689.44 = 397,519.92 : x
  2. Step 2: Convert to fraction form
    669,636.72/923,689.44 = 397,519.92/x
  3. Step 3: Cross multiply
    669,636.72x = 923,689.44 × 397,519.92
  4. Step 4: Simplify right side
    669,636.72x = 367,184,952,293.65
  5. Step 5: Solve for x
    x = 367,184,952,293.65/669,636.72
  6. Step 6: Final answer
    x = 548,334.55

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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.