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Finding the Fourth Proportional to 669,637.72, 923,690.82 and 397,520.92

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Solution

The fourth proportional to 669,637.72, 923,690.82 and 397,520.92 is: 548,335.93

Step by Step Solution

  1. Step 1: Write the proportion equation
    669,637.72 : 923,690.82 = 397,520.92 : x
  2. Step 2: Convert to fraction form
    669,637.72/923,690.82 = 397,520.92/x
  3. Step 3: Cross multiply
    669,637.72x = 923,690.82 × 397,520.92
  4. Step 4: Simplify right side
    669,637.72x = 367,186,424,561.95
  5. Step 5: Solve for x
    x = 367,186,424,561.95/669,637.72
  6. Step 6: Final answer
    x = 548,335.93

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Double scale
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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.