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Finding the Fourth Proportional to 628,567.92, 941,751.72 and 428,238

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Solution

The fourth proportional to 628,567.92, 941,751.72 and 428,238 is: 641,607.47

Step by Step Solution

  1. Step 1: Write the proportion equation
    628,567.92 : 941,751.72 = 428,238 : x
  2. Step 2: Convert to fraction form
    628,567.92/941,751.72 = 428,238/x
  3. Step 3: Cross multiply
    628,567.92x = 941,751.72 × 428,238
  4. Step 4: Simplify right side
    628,567.92x = 403,293,873,069.36
  5. Step 5: Solve for x
    x = 403,293,873,069.36/628,567.92
  6. Step 6: Final answer
    x = 641,607.47

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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.