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Finding the Fourth Proportional to 606,872.40, 911,345.40 and 397,438.80

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Solution

The fourth proportional to 606,872.40, 911,345.40 and 397,438.80 is: 596,837.20

Step by Step Solution

  1. Step 1: Write the proportion equation
    606,872.40 : 911,345.40 = 397,438.80 : x
  2. Step 2: Convert to fraction form
    606,872.40/911,345.40 = 397,438.80/x
  3. Step 3: Cross multiply
    606,872.40x = 911,345.40 × 397,438.80
  4. Step 4: Simplify right side
    606,872.40x = 362,204,022,161.52
  5. Step 5: Solve for x
    x = 362,204,022,161.52/606,872.40
  6. Step 6: Final answer
    x = 596,837.20

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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.