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Finding the Fourth Proportional to 468,067.24, 645,347.10 and 390,653.56

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Solution

The fourth proportional to 468,067.24, 645,347.10 and 390,653.56 is: 538,613.09

Step by Step Solution

  1. Step 1: Write the proportion equation
    468,067.24 : 645,347.10 = 390,653.56 : x
  2. Step 2: Convert to fraction form
    468,067.24/645,347.10 = 390,653.56/x
  3. Step 3: Cross multiply
    468,067.24x = 645,347.10 × 390,653.56
  4. Step 4: Simplify right side
    468,067.24x = 252,107,142,050.68
  5. Step 5: Solve for x
    x = 252,107,142,050.68/468,067.24
  6. Step 6: Final answer
    x = 538,613.09

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Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.