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Finding the Fourth Proportional to 613,993.12, 921,088.09 and 259,059.42

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Solution

The fourth proportional to 613,993.12, 921,088.09 and 259,059.42 is: 388,630.65

Step by Step Solution

  1. Step 1: Write the proportion equation
    613,993.12 : 921,088.09 = 259,059.42 : x
  2. Step 2: Convert to fraction form
    613,993.12/921,088.09 = 259,059.42/x
  3. Step 3: Cross multiply
    613,993.12x = 921,088.09 × 259,059.42
  4. Step 4: Simplify right side
    613,993.12x = 238,616,546,364.31
  5. Step 5: Solve for x
    x = 238,616,546,364.31/613,993.12
  6. Step 6: Final answer
    x = 388,630.65

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1.5x scale

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.