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Finding the Fourth Proportional to 390,067.71, 585,059.64 and 264,513.86

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Solution

The fourth proportional to 390,067.71, 585,059.64 and 264,513.86 is: 396,742.36

Step by Step Solution

  1. Step 1: Write the proportion equation
    390,067.71 : 585,059.64 = 264,513.86 : x
  2. Step 2: Convert to fraction form
    390,067.71/585,059.64 = 264,513.86/x
  3. Step 3: Cross multiply
    390,067.71x = 585,059.64 × 264,513.86
  4. Step 4: Simplify right side
    390,067.71x = 154,756,383,706.61
  5. Step 5: Solve for x
    x = 154,756,383,706.61/390,067.71
  6. Step 6: Final answer
    x = 396,742.36

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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.