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Finding the Fourth Proportional to 613,988.34, 921,080.90 and 259,054.64

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Solution

The fourth proportional to 613,988.34, 921,080.90 and 259,054.64 is: 388,623.47

Step by Step Solution

  1. Step 1: Write the proportion equation
    613,988.34 : 921,080.90 = 259,054.64 : x
  2. Step 2: Convert to fraction form
    613,988.34/921,080.90 = 259,054.64/x
  3. Step 3: Cross multiply
    613,988.34x = 921,080.90 × 259,054.64
  4. Step 4: Simplify right side
    613,988.34x = 238,610,280,456.66
  5. Step 5: Solve for x
    x = 238,610,280,456.66/613,988.34
  6. Step 6: Final answer
    x = 388,623.47

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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.