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Finding the Fourth Proportional to 390,609.54, 585,914.31 and 124,451.64

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Solution

The fourth proportional to 390,609.54, 585,914.31 and 124,451.64 is: 186,677.46

Step by Step Solution

  1. Step 1: Write the proportion equation
    390,609.54 : 585,914.31 = 124,451.64 : x
  2. Step 2: Convert to fraction form
    390,609.54/585,914.31 = 124,451.64/x
  3. Step 3: Cross multiply
    390,609.54x = 585,914.31 × 124,451.64
  4. Step 4: Simplify right side
    390,609.54x = 72,917,996,778.97
  5. Step 5: Solve for x
    x = 72,917,996,778.97/390,609.54
  6. Step 6: Final answer
    x = 186,677.46

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Similar ratio
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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.